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Bach Flower Remedies are thought to help balance emotional state and are commonly recommended by practitioners for psychological problems and pain. We assessed whether Bach Flower Remedies (BFRs) are safe and efficacious for these indications by performing a systematic review of the literature. We searched MEDLINE, Embase, AMED, and the Cochrane Library from inception until June 2008 and performed a hand-search of references from relevant key articles. For efficacy, we included all prospective studies with a control group. For safety, we also included retrospective, observational studies with more than 30 subjects. Two authors abstracted data and determined risk of bias using a recognised rating system of trial quality. Four randomised controlled trials (RCTs) and two additional retrospective, observational studies were identified and included in the review. Three RCTs of BFRs for students with examination anxiety, and one RCT of BFRs for children with attention-deficit hyperactivity disorder (ADHD) showed no overall benefit in comparison to placebo. Due to the number and quality of the studies the strength of the evidence is low or very low. We did not find any controlled prospective studies regarding the efficacy of BFRs for pain. Only four of the six studies included for safety explicitly reported adverse events. Most of the available evidence regarding the efficacy and safety of BFRs has a high risk of bias. We conclude that, based on the reported adverse events in these six trials, BFRs are probably safe. Few controlled prospective trials of BFRs for psychological problems and pain exist. Our analysis of the four controlled trials of BFRs for examination anxiety and ADHD indicates that there is no evidence of benefit compared with a placebo intervention.
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BioMed Central
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BMC Complementary and
Alternative Medicine
Open Access
Research article
Bach Flower Remedies for psychological problems and pain: a
systematic review
Kylie Thaler*1, Angela Kaminski1, Andrea Chapman1, Tessa Langley2 and
Gerald Gartlehner1
Address: 1Department for Evidence-based Medicine and Clinical Epidemiology, Danube University, Krems, A-3500, Austria and 2Ludwig
Boltzmann Institute for Health Technology Assessment, Garnisongasse 7/20, A-1090 Vienna, Austria
Email: Kylie Thaler* - kylie.thaler@donau-uni.ac.at; Angela Kaminski - angela.kaminski@donau-uni.ac.at;
Andrea Chapman - andrea.chapman@donau-uni.ac.at; Tessa Langley - tessa_langley@hotmail.com;
Gerald Gartlehner - gerald.gartlehner@donau-uni.ac.at
* Corresponding author
Abstract
Background: Bach Flower Remedies are thought to help balance emotional state and are
commonly recommended by practitioners for psychological problems and pain. We assessed
whether Bach Flower Remedies (BFRs) are safe and efficacious for these indications by performing
a systematic review of the literature.
Methods: We searched MEDLINE®, Embase, AMED, and the Cochrane Library from inception
until June 2008 and performed a hand-search of references from relevant key articles. For efficacy,
we included all prospective studies with a control group. For safety, we also included retrospective,
observational studies with more than 30 subjects. Two authors abstracted data and determined
risk of bias using a recognised rating system of trial quality.
Results: Four randomised controlled trials (RCTs) and two additional retrospective, observational
studies were identified and included in the review. Three RCTs of BFRs for students with
examination anxiety, and one RCT of BFRs for children with attention-deficit hyperactivity disorder
(ADHD) showed no overall benefit in comparison to placebo. Due to the number and quality of
the studies the strength of the evidence is low or very low. We did not find any controlled
prospective studies regarding the efficacy of BFRs for pain. Only four of the six studies included for
safety explicitly reported adverse events.
Conclusion: Most of the available evidence regarding the efficacy and safety of BFRs has a high risk
of bias. We conclude that, based on the reported adverse events in these six trials, BFRs are
probably safe. Few controlled prospective trials of BFRs for psychological problems and pain exist.
Our analysis of the four controlled trials of BFRs for examination anxiety and ADHD indicates that
there is no evidence of benefit compared with a placebo intervention.
Published: 26 May 2009
BMC Complementary and Alternative Medicine 2009, 9:16 doi:10.1186/1472-6882-9-16
Received: 28 January 2009
Accepted: 26 May 2009
This article is available from: http://www.biomedcentral.com/1472-6882/9/16
© 2009 Thaler et al; licensee BioMed Central Ltd.
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0),
which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
BMC Complementary and Alternative Medicine 2009, 9:16 http://www.biomedcentral.com/1472-6882/9/16
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Background
Bach flower remedies (BFRs) are a widely-available, pop-
ular form of complementary and alternative medicine
(CAM) developed in the 1930s by the British physician Dr
Edward Bach. Bach devoted his life to the discovery of 38
remedies that correspond to 38 negative emotional states
(Table 1). [1,2] Bach believed in a truly holistic form of
emotional healing; BFRs are believed to assist the body in
healing itself by providing "a positive emotional state that
is conducive to the restoration of a healthy equilibrium
and by acting to catalyze an individual's own internal
resources for maintaining balance".[3] According to Bach,
the restoration of balance could be used for treating any
medical condition, however BFRs are commonly used for
psychological problems and stress.[4]
Only flowers that grow naturally in the wild are suitable
for preparation. BFRs are prepared in two ways following
Bach's precise directions: the sun method and the boiling
method. In the sun method, fully opened flower heads
still fresh with dew are floated on the surface of pure
spring water in a glass bowl and left for a few hours in the
sunshine, whereas in the boiling method, used for trees
and bushes, the branches and leaves are boiled in water
for half an hour.[1] In both methods, the plant matter is
removed, and, according to Bach, the water retains the
vibrations or energy of the flower. The liquid, called the
mother tincture, is filtered and mixed with brandy, which
acts as a preservative.[5] The remedies can be taken orally
diluted in a glass of water, or applied directly to pulse
points such as the wrists, temples and behind the ears.[3]
Table 1: The Bach flower remedies and their indications
Agrimony mental torture behind a cheerful face
Aspen fear of unknown things
Beech Intolerance, perfectionist
Centazry the inability to say 'no'
Cerato lack of trust in one's own decisions
Cherry Plum fear of the mind giving way, fear of losing control
Chestnut Bud failure to learn from mistakes
Chicory selfish, possessive love, needs the appreciation of others
Clematis dreaming of the future without working in the present, absentminded
Crab Apple the cleansing remedy, also for self-hatred, poor body image
Elm overwhelmed by responsibility, pressures of work
Gentian discouragement after a setback, pessimism
Gorse hopelessness and despair
Heather self-centredness and self-concern
Holly hatred, envy and jealousy, feels victimized
Honeysuckle living in the past, overwhelming nostalgia for the past
Hornbeam procrastination, tiredness at the thought of doing something
Impatiens impatience
Larch lack of confidence, competent but fear failure
Mimulus fear of known things, shy, nervous personality
Mustard deep gloom for no reason
Oak the plodder who keeps going past the point of exhaustion
Olive exhaustion following mental or physical effort
Pine guilt, self-blame
Red Chestnut over-concern for the welfare of loved ones
Rock Rose terror and fright, useful for nightmares
Rock Water self-denial, rigidity and self-repression
Scleranthus inability to choose between alternatives
Star of Bethlehem Shock, loss, bereavement, trauma
Sweet Chestnut Extreme mental anguish, when everything has been tried and there is no light left
Vervain over-enthusiasm, perfectionism
Vine dominance and inflexibility
Walnut protection from change and unwanted influences, birth, puberty, divorce
Water Violet pride and aloofness
White Chestnut unwanted thoughts and mental arguments, unwanted thoughts, unable to concentrate
Wild Oat uncertainty over one's direction in life
Wild Rose drifting, resignation, apathy
Willow self-pity and resentment
Rescue Remedy Composite remedy consisting of Star of Bethlehem, Rock Rose, Cherry Plum and Clementis; for emergencies to combat
fear, panic, shock and fear of losing control
Source: [1,5]
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They can be used individually or in combination with up
to seven other tinctures.[5] BFRs do not contain pharma-
cologically relevant remnants of the original flowers[6]
and are considered safe to use in combination with other
medications, as well as by pregnant women, children,
babies and the elderly.[5,7] However, it has been sug-
gested that BFRs could be dangerous for recovering alco-
holics due to their alcohol content.[4]
Bach's 38 flower remedies each address one of the seven
psychological causes of illness: fear, uncertainty, insuffi-
cient interest in present circumstances, loneliness, over-
sensitivity to influences and ideas, despondency or
despair and overcare for the welfare of others.[7] The indi-
vidual patient is prescribed particular remedies depending
on the acute problem at hand, which should be individu-
ally tailored and adjusted during the course of therapy,
typically over weeks to months.[1,7] For example, the
flower 'impatiens' is used for impatience and irritability,
'mimulus' for fear of known things, shyness, and timidity,
and 'olive' for those that are drained of energy.[7] In addi-
tion, some BFRs are categorized as "type" remedies and
are specific to a certain character trait or disposition.[1] A
person who suffers from overwhelming guilt might be
offered pine as a type remedy, and chronically indecisive
people could benefit from Scleranthus.[1] Three BFRs are
helpful to unblock the energy flow in patients without
obvious symptoms: Wild Oat, Holly, and Star of Bethle-
hem.[7] Because the relief of anxiety is a major factor in
pain relief, proponents of BFRs have suggested that BFRs
also have the potential to function as a therapeutic agent
for pain.[8] "Rescue Remedy", also known as "Five Flower
Remedy", is the only combination of BFRs determined by
Bach himself and functions as an all purpose emergency
agent in situations of acute anxiety or distress. It contains
a mixture of star of Bethlehem (Ornithogalum umbella-
tum), rock rose (Helianthemum nummularium), impa-
tiens (Impatiens glandulifera), cherry plum (Prunus
cerasifera), and clematis (Clematis vitalba). [1,3,5,7] Res-
cue remedy is recommended as a first aid preparation for
situations where acute stress is likely to occur.
According to Bach, the remedies work through the life force
energy or vibration that is transmitted from the flowers to
the tincture. This vibration interacts on a subtle energy level
with the individual to rebalance the conscious and uncon-
scious and dissolve old patterns of behaviour.[5] By allevi-
ating negative feelings and relieving the underlying
emotional and psychological problems of the patient, a
physical healing is enabled. Patients sometimes experience
a worsening of their symptoms before an improvement,
which can manifest as aggravation.[9]
Training as a Bach Flower Remedy practitioner is offered
through the Bach Foundation in the UK and at other cen-
tres in Europe.[10,11] The courses are designed for thera-
pists in similar fields who would like to incorporate BFRs
into their practice. BFRs are also available "over-the-coun-
ter "in some countries, and on-line through several web-
sites.[12] One bottle of BFRs cost approximately £6 (7 or
US$10).
A previous systematic review of BFRs for overdue birth,
examination anxiety, and depression concluded that the
available studies did not indicate that BFRs are clinically
different to placebo for those indications.[6] Our review
was initially undertaken to provide evidence-based guid-
ance to an Austrian state insurance agency regarding
financing complementary and alternative therapies. The
objective of our study was to examine the evidence on
both the efficacy and safety of BFRs. For this reason we
included evidence from controlled trials as well as obser-
vational studies. We limited indications of interest to psy-
chological problems and pain because these are the most
common indications for BFRs. [8,13]
Methods
Literature search
To identify relevant studies we searched MEDLINE®,
Embase, AMED, and the Cochrane Library up to June
2008, covering the entire time span of the databases. We
used either Medical Subject Headings (MeSH) as search
terms when available or key words when appropriate. We
searched for variations of the terms "Bach flower reme-
dies", "flower essence", "Bach flower", "rescue remedy"
and "flower therapy" [see Additional file 1]. Other flower
essence treatments exist that were not described by Bach,
[14] however, BFR practitioners do not advocate their
use.[10] Therefore, we limited our review to the 38 BFRs
plus Rescue Remedy. We limited searches to English and
German language literature, which reflects the language
capabilities of our team. In addition, we manually
searched reference lists of pertinent review articles and let-
ters to the editor to identify additional evidence.
Study selection
Two persons independently reviewed abstracts and rele-
vant full-text articles. To assess efficacy regarding out-
comes of interest, we included randomized controlled
trials as well as prospective, controlled observational stud-
ies. To determine the risk for harms (specific adverse
events, rates of adverse events, and discontinuations
attributable to adverse events), we also included data
from uncontrolled and retrospective observational studies
with 30 participants. Table 2 summarizes the eligibility
criteria.
If both reviewers agreed that a study did not meet eligibil-
ity criteria, we excluded it. We also formally excluded
studies that met eligibility criteria but were reported only
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as an abstract or as a letter to the editor. Investigators
resolved disagreements about inclusion or exclusion by
consensus or by involving a third reviewer.
Data extraction and assessment of risk of bias
Trained reviewers abstracted data from each study and
assigned a quality rating. A senior reviewer read each
abstracted article, evaluated completeness of data abstrac-
tion, and confirmed the quality rating. Investigators
resolved any disagreements by discussion and consensus
or by consulting an independent party.
We assessed the risk of bias of trials based on the
Cochrane Collaboration's tool for assessing risk of bias
and applied ratings of high, unclear or low. [15] Primary
elements of quality assessment for trials included rand-
omization sequence generation and allocation conceal-
ment, similarity of compared groups at baseline, blinding,
completeness of outcome data and outcome reporting,
and overall and differential loss to follow-up. To assess
observational studies, we used criteria involving selection
of cases or cohorts and controls, adjustment for con-
founders, methods of outcomes assessment, length of fol-
low-up, and statistical analysis.[16] Studies with a fatal
flaw in one or more categories were rated as having a high
risk of bias.
Data synthesis
Because data was insufficient to conduct quantitative
analyses, we summarized findings qualitatively.
Rating strength of evidence
We rated the strength of the available evidence for specific
key questions and outcomes in a four-part hierarchy
(high, moderate, low, and very low) using an approach
proposed by the GRADE working group.[17] It incorpo-
rates four key elements: study design, study quality (risk of
bias), consistency of results, and directness (availability of
data on outcomes or populations of interest) and offers an
estimation of the level of confidence in the estimate of
effect.
Results
Overall we identified 181 citations. Figure 1 illustrates the
disposition of the literature. We included four rand-
omized controlled trials (RCTs) that randomized patients
to BFRs or placebo for either examination anxiety
[3,18,19] or ADHD.[20] We formally excluded two RCTs
that were both published as letters to the editor because
they contained too little information to assess their qual-
ity and we were unable to obtain the necessary informa-
tion from the authors: one evaluating BFRs in anxiety in a
psychiatric population and one using BFRs to treat atten-
tion deficit hyperactivity disorder (ADHD), however we
summarize the results briefly. [9,21] We located a report
of the preliminary findings of an observational trial of
BFRs for 12 patients with moderate depression.[22]
Despite multiple attempts, we were unfortunately unable
to obtain a copy of the final publication that reportedly
included additional results for 18 patients with major
depression and therefore would have qualified for inclu-
sion in our safety analysis.[23]
The individual study results are summarized and pre-
sented in table 3. Table 4 presents the strength of the evi-
dence regarding efficacy and harms of BFRs for individual
indications of interest. In the following paragraphs we
summarize results of included studies by indication.
Efficacy of BFRs for examination anxiety
Three placebo-controlled RCTs examined the efficacy of
BFRs for the treatment of examination anxiety in 272 stu-
dents between the ages of 18 and 65. [3,18,19] Two stud-
ies used the Five Flower Rescue Remedy, a third a
combination of 10 BFRs as interventions. Study durations
ranged from three hours to 14 days. Examination anxiety
was measured using the State-Trait Anxiety Inventory for
Adults (STAI),[18] the STAI S-Anxiety subscale,[3] or the
Table 2: Eligibility criteria
Population Patients with pain and/or psychological symptoms
Intervention Bach flower remedies only
Comparison Placebo
Outcomes Pain reduction, improvement of symptoms, adverse events
Timing No restriction
Setting No restriction
Study design For efficacy: all prospective, controlled studies; no sample size limitations
For harms: all prospective, controlled studies and all observational studies with a minimum sample size of 30.
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Disposition of the literatureFigure 1
Disposition of the literature.
Titles and abstracts
identified through
searches:
n = 181
Full-text articles
retrieved:
n = 33
Titles and abstracts excluded:
n = 146
Articles included in review:
n = 6
x3 RCTs
x1 cross-over RCT
x2 saftey
Full text articles excluded:
n = 17
xnot a primary study n = 2
x wrong study design n = 7
xwrong outcome measure n = 4
xnot enough information for rating
quality n = 2
xrepeat publication n = 2
Unable to retrieve full text:
n = 1
Background:
n = 10
Abstract-only:
n = 1
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Table 3: Summary of study results for efficacy
Author, Year,
Reference number
Armstrong and Ernst
2001 [18]
Walach et. al. 2001 [19] Pintov et. al. 2005 [20] Halberstein et. al. 2007
[3]
Country United Kingdom Germany Israel United States
Study design RCT Cross-over RCT RCT RCT
Risk of bias High
(loss to follow up 55%)
High
(inadequate randomization)
High
(loss to follow up 42.5%)
Low
Number of patients 1006140111
Loss to follow-up 55% 9.8% 42.5% None
Study population Students with examination
anxiety
Students with examination
anxiety registered to take
at least two exams, two
weeks apart
Children with clinical
diagnosis of any subtype of
ADHD
Nursing students with
examination anxiety
Patient age
(range and/or average,
in years)
Not reported 28 7–11 25.6 (18–49)
Indication for BFR Examination anxiety Examination anxiety ADHD Examination anxiety
Intervention 1–4 doses of Five Flower
Remedy (Rescue Remedy)
per day
Prunus cerasifera, Clematis
vitalba, Impatiens
glandulifera, Helianthemum
and Ornithogalum
umbellatum
At least 4 drops of a
combination of 10 BFRs
per day: Impatiens, mimulus,
gentian, chestnut bud, rock
rose, larch, cherry plum,
white chestnut, scleranthus
and elm
4 drops of five flower BFR
4 times per day: Prunus
cerasifera, Clematis vitalba,
Impatiens glandulifera,
Helianthemum and
Ornithogalum umbellatum
Four drops of Rescue
Remedy every 20 minutes
over 3 hours: Prunus
cerasifera, Clematis vitalba,
Impatiens glandulifera,
Helianthemum and
Ornithogalum umbellatum
Control Placebo Placebo Placebo Placebo
Duration of treatment 7 days 4 weeks (two weeks
before first exam and two
weeks before second
exam)
3 months 3 hours
Main outcome
measures
State-Trait Anxiety
Inventory (STAI)
German Test Anxiety
Inventory (TAI-G)
Conner's scale State-Trait Anxiety
Inventory (STAI) for
Adults, S-Anxiety subscale
Results No significant difference in
State anxiety score (on the
night before examination
most likely to cause
anxiety) between
experimental and placebo
groups – 51.5 in BFR
group, 54.4 in placebo
group (P = 0.834)
No significant difference
between experimental and
placebo group for mean
reduction in test anxiety:
5.25 in BFR group, 7.69 in
placebo group (P = 0.55)
No significant difference in
mean Conner's scores
between experimental and
placebo group before
(16.59 in BFR group, 17.12
in placebo group) or after
(11.90 in BFR group, 13.58
in placebo group)
treatment (P not
reported).
No significant difference in
STAI S-Anxiety subscale
between treatment and
placebo groups.
RCT : (randomised controlled trial)
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Table 4: Evidence profile for Bach flower remedies
Number of
studies
(patients)
Design Risk of bias Consistency of
results
Directness Size of effect Other
modifying
factors
Strength of
the collective
evidence
Outcome: Reduction in examination anxiety compared with control
3 (272) RCT High Yes Yes Similar treatment
effects and
efficacy between
BFR and control
groups in STAI
and TAI-G.
None Low
Outcome: Reduction in item 15 "anxiety" on VAS compared with control in psychiatric patients suffering anxiety as the main
symptom
1 (98) RCT Cannot assess N/A Yes No significant
difference
between
treatment (27.40
± 30.45) and
placebo
(21.73 ± 27.28)
None Very low
Outcome: Improvement in Connor's score compared with control (ADHD)
1 (40) RCT High N/A Yes 4.69 points
reduction in
Connor's score,
no significant
difference
between
treatment and
placebo
None Very low
Outcome: Attenuation of stress
No evidence
Outcome: Depression
No evidence
Outcome: Pain relief
No evidence
Outcome: Quality of life
No evidence
Outcome: Adverse events
6 (468) RCT, case series High Yes Yes 3 experimental
group subjects
had side effects
None Very low
STAI: State-Trait Anxiety Inventory, TAI-G: German version of the Test Anxiety Inventory, VAS: Visual Analogue Scale, ADHD: Attention-deficit/
Hyperactivity Disorder, RCT: Randomized Controlled Trial; N/A: not applicable
Strength of the evidence (GRADE approach): High: further research is very unlikely to change our confidence in the estimate of effect; Moderate:
further research is likely to have an important impact on our confidence in the estimate of effect and may change the estimate; Low: further
research is very likely to have an important impact on our confidence in the estimate of effect and is likely to change the estimate; Very Low: any
estimate of effect is very uncertain.
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German version of the Test Anxiety Inventory (TAI-
G).[19]
The best available evidence was a RCT conducted in the
United States (US) which randomized 111 nursing stu-
dents to Rescue Remedy or placebo after leading them to
believe they had to take a surprise examination.[3] The
students applied four drops of Rescue Remedy or placebo
to their tongues every 20 minutes for a period of three
hours. Overall, the study was well conducted and had a
low risk of bias. Both participants and study personnel
were blinded to the treatment allocation, and the rand-
omization sequence was computer generated. Measure-
ment of the STAI S-Anxiety subscale was performed before
the intervention and again 3 hours later.
Results indicated similar treatment effects of BFRs and
placebo. Students treated with BFRs exhibited a reduction
of 0.44 points on the STAI S-Anxiety subscale (reduction
from 2.21 to 1.77), compared with a 0.38 point reduction
in students on placebo (reduction from 2.34 to 1.96). This
difference did not reach statistical significance and is most
likely also not clinically relevant. In post hoc ANOVA
analyses of various subgroups of patients, however, BFRs
reduced anxiety in the subgroup of students who demon-
strated high levels of anxiety at the first measurement (N
= 39), more than the placebo (data not reported; p =
0.03). However, this result should be interpreted with
caution because subgroup analyses are prone to chance
findings due to multiple testing, or alternatively "regres-
sion to the mean" may have occurred. [24]
The other two studies, one conducted in Germany [19],
the other in the United Kingdom (UK) [18] enrolled fewer
participants and both had a high risk of bias (inadequate
randomization [19] or high loss to follow-up [18]). Nev-
ertheless, findings were consistent with results from the
US trial. The German study randomized 61 students to a
pre-determined combination of 10 BFRs (impatiens,
mimulus, gentian, chestnut bud, rock rose, larch, cherry
plum, white chestnut, scleranthus, and elm) or placebo in
a four-week cross-over design.[19] The RCT conducted in
the UK randomized 100 students to at least one week of
Five Flower Rescue Remedy or placebo.[18] Measure-
ments were taken at baseline, the night before the exami-
nation and after the examination using the STAI and the
TAI-G.[18]
Both trials did not detect any differences in efficacy
between BFRs and placebo for the treatment of examina-
tion anxiety. The university students in the German study
actually reported a numerically greater reduction of the
TAI-G in students taking placebo than in students taking
BFRs.[19] The mean reduction in the BFRs group was
5.25, compared with 7.69 in the placebo group (P = 0.55).
Similarly, the UK trial [18] found no significant difference
in the STAI on the night before the examination between
experimental and placebo groups: The score was 51.5 in
the BFRs group and 54.4 in the placebo group (P = 0.834).
Efficacy of BFRs for anxiety in psychiatric patients
A fourth RCT, also conducted in Germany, reported on
the efficacy of rescue remedy for treating anxiety in 98 psy-
chiatric patients (with diagnoses of anxiety disorder,
depression or depressive symptoms during a non-acute
schizoaffective psychosis) who had anxiety as their main
symptom.[21] After three days of therapy, there was no
difference in improvement of the item 15 "anxiety" meas-
ure on a visual analogue scale (VAS) between the BFRs
and placebo group. We were unable to include this study,
as not enough information regarding randomization,
masking, attrition or the statistical analysis was available
to evaluate its internal validity. Numerous attempts to
obtain the appropriate information from the authors
unfortunately failed. Nonetheless, the results are consist-
ent with the other trials of BFRs for anxiety.
Efficacy of BFRs for Attention-deficit Hyperactivity
Disorder (ADHD)
We found two RCTs of BFRs for ADHD. One RCT con-
ducted in Israel reported on the efficacy of five BFRs (Pru-
nus cerasifera, Clematis vitalba, Impatiens glandulifera,
Helianthemum and Ornithogalum, the components of
Five Flower/Rescue Remedy[18]) in treating forty 6–11
year old children with a DSM (Diagnostic and Statistical
Manual)-VI confirmed diagnosis of ADHD.[20] The chil-
dren were randomized to three months of BFR or placebo.
The mean Conner's score before treatment was 16.59 in
the BFRs group and 17.12 in the placebo group. After
treatment, the corresponding values were 11.90 and
13.58, indicating a significant improvement over time for
both groups (p = 0.001), however no statistically signifi-
cant difference between BFRs and placebo (p value not
given). Again, the very high dropout rate (42.5%) in this
study, attributed to difficulty in giving children the drops
four times a day, indicates the study has a high risk of bias.
We excluded the second randomized, controlled trial of
10 children aged 5- to 12 with a diagnosis of ADHD
requiring partial hospitalization, which was published in
abbreviated form as a letter to the editor.[9] Not enough
information regarding randomization, masking or statis-
tical analysis was available to rate its internal validity. The
children received either Rescue Remedy plus vervain, crab
apple and walnut BFRs or a placebo 2–3 times a day, with
follow-up performed at three weeks and three months.
None of the 10 children completed the study. The authors
report no difference in the Columbia Impairment Scale
(CIS) score, however a significant difference between
Childhood Attention Profile (CAP) score at both three
weeks and three months is reported (p = 0.03; data not
reported).
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Efficacy of BFRs for stress
Two randomized controlled trials from the same author
examined the efficacy of BFRs in subjects under
stress.[25,26] We excluded both studies, as they did not
meet our pre-specified inclusion criteria, however due to
lack of evidence we summarize them briefly here. One
study randomized the 24 participants to rescue remedy
and Yarrow Special Formula, which contains non-Bach
flower essences (Achillea millefolium, Achillea millefolium
var. rubra, Achillea filipendulina, Arnica mollis, Echinacea
purpurea).[26,27] The subjects underwent "intense envi-
ronmental stimulation by fluorescent lights and their
accompanying electromagnetic fields". The second study
randomized 24 participants aged 18–67 to Five Flower
Formula (Rescue Remedy) or placebo, and submitted the
participants to a Paced Serial Arithmetic Task (PSAT).[25]
Stress levels were determined by quantitative electroen-
cephalography (qEEG), surface electromyography
(sEMG), or hand temperature and skin conductance.
None of these parameters meet our pre-specified outcome
criteria (improvement of symptoms).[28] Overall, there
were no significant differences between the BFRs and pla-
cebo groups.
Efficacy of BFRs for depression
We located one publication, titled "preliminary findings",
of an open time-series that compared one month of usual
care followed by three months of usual care plus individ-
ualized flower essence therapy in 12 moderately
depressed patients.[22] This study was not controlled and
included non-BFR essences and therefore we excluded it.
Another study by the same author with the same design
was included in a previous systematic review and reported
as including 12 patients with moderate depression and 18
patients with major depression.[23] Based on available
information the study would not have met our inclusion
criteria for efficacy (not controlled, non-BFR essences).
Despite multiple attempts we were unable to locate the
full text to confirm the exclusion. There was no safety
information reported in the preliminary findings publica-
tion.[22]
Efficacy of BFRs for pain relief
We did not find any studies on the use of BFRs in pain that
met our inclusion criteria for efficacy. We briefly summa-
rize the findings of one retrospective case series because it
is the only available evidence. [8] The study analyzed 41
case reports of patients with pain who were amongst 389
patients treated with BFRs by students of The Dr. Edward
Bach Foundation's practitioner training course in Eng-
land. In this study, 19 of the 41 case reports described an
improvement in the patient's physical pain, and 36 of the
41 case reports reported an improvement in emotional
outlook. In 20 cases there was no information regarding
pain.
Harms
Of the four controlled trials, one did not make any refer-
ence to harms of BFRs.[20] In total, only four adverse
events were reported in subjects taking BFRs. [18,19]
Three of the British university students in the BFR group
had adverse events; headache was reported by two sub-
jects, one withdrew from the study after three days as a
result, and one subject reported skin eruptions.[18]
Walach et al.[19] reported one subject with an adverse
event; however they did not specify the nature of the event
or whether it occurred in a subject taking BFRs or placebo.
In addition, we found two observational studies of BFRs
with more than 30 participants, one retrospective case
series of BFRs for pain, [8] and one prospective observa-
tional study of 115 patients performed in Italy.[29] Both
observational studies demonstrated a high risk of bias.
The observational study of BFRs for pain did not report on
adverse events.[8] None of the participants in the Italian
observational study or American RCT suffered an adverse
event.[3,29] The six studies included data on 468 patients.
None of the trials defined adverse events in advance and
all relied on participant self-reporting of adverse events.
Table 5 summarizes the evidence on harms.
Recruitment and funding of included trials
The three trials that assessed the effect of BFRs in examina-
tion anxiety recruited students from university campuses.
[18,19,3] One of the studies was supported by the Cecil
Pilkington Trust (a British-based private charitable organ-
isation) and a grant from "The Twelve Healers Trust"
(who sponsor the "Bach Flower Research Programme"
website). [18,30] The other studies [3,19] reported no
commercial or private funding, although BFRs were sup-
plied to one study by The Nelson Company.[3] The
authors reporting on BFR in ADHD did not specify partic-
ipant recruitment methods or funding.[20]
Discussion
Summary of the main findings
The evidence regarding Bach Flower Remedies for psycho-
logical problems is very limited and the majority of stud-
ies have methodological problems. Only four prospective
controlled studies were available. [19,18,20,3] All of these
indicated that BFRs are not effective over and above the
effects of placebo for examination-related anxiety or
ADHD. We could not find any controlled evidence exam-
ining the efficacy of BFRs for the treatment of pain. Nor
did we find any evidence on the efficacy of BFRs for other
psychological problems for which their use is suggested,
such as phobias.[9]
Overall, we rated the strength of the evidence for the treat-
ment of examination-related anxiety as low, indicating
that future studies might have an important impact on the
estimate of the effect. For the treatment of anxiety in psy-
BMC Complementary and Alternative Medicine 2009, 9:16 http://www.biomedcentral.com/1472-6882/9/16
Page 10 of 12
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chiatric patients, and ADHD in children, as well as for the
risk of harms we deemed the strength of the evidence to
be very low, indicating that any estimate of the effect is
very uncertain.
Strengths and limitations of this review
We evaluated the evidence for BFR using the standard
methodology of evidence-based medicine (EBM). Thus,
we rated five of the six included trials as being at high risk
of bias. We recognise that the evaluation of complemen-
tary and alternative medicine practices using EBM princi-
ples is controversial. [31,32] Although proponents of
EBM point out that even interventional forms of CAM
(e.g., acupuncture) have successfully incorporated ran-
domisation and blinding into their study design and eval-
uation,[31] and that an individualized approach to
therapy does not preclude blinding or randomisation,
some CAM researchers fear that focussing exclusively on
the internal validity of trials means ignoring important
non-quantifiable differences between individuals, and
leads to conclusions that do not represent the effective-
ness of treatments under real-world conditions.[32]
Moreover, the emphasis on self-healing and self-aware-
ness integral to CAM (and Bach flower therapy as
described by Bach) is not able to be quantified, and hence
not able to be assessed.[32] CAM practitioners have
argued that the process of defining specific outcomes, ran-
domising patients to placebos, and blinding both thera-
pist and patient interferes with the holistic and
individualised practitioner-patient relationship and pro-
duces unreliable and unfair results that do not reflect the
true use of the therapy in its original form.[32] For exam-
ple, one Bach flower practitioner argues that "qualities
such as compassion, trust, empathy, and positive motiva-
tion can directly help to improve outcomes".[8] Indeed, a
recent survey of physicians demonstrated that many pre-
scribe inert or minimally active pharmacological sub-
stances, presumably in order to "promote positive
therapeutic expectations".[33]
All of the studies in this review used a pre-determined
mixture of BFRs which does not correspond with their use
in real practice. Furthermore, the anxiety states in several
of the trials were experimentally induced and may differ
from typical anxiety as experienced by patients. The short
period of BFR administration in several of the trials (ten
minutes, three hours, one week) does not comply with the
recommendations of BFR practitioners, though it may be
typical of "over-the-counter" use.[4]
Because RCTs are often criticized as being unsuitable for
assessing CAM interventions, we specifically included not
only RCTs, but also non-randomized controlled trails and
large (N 30) observational studies in our review. Despite
this, we were able to include only four trials and two
observational studies. Because the evidence was insuffi-
cient to be pooled we did not conduct any formal statisti-
cal tests such as funnel plots or Kendell's test to assess
publication bias. We searched clinical trials registries and
could not detect any studies that were registered but have
not been published. Nevertheless, publication bias is
always major threat to systematic reviews. Similarly,
retrieval bias cannot be ruled out.
Comparison with existing literature
This is, to our knowledge, the first systematic review of
BFRs that has followed the QUORUM recommendations
(Quality of Reporting of Meta-analyses).[34] A systematic
review of BFRs published in 2002 concluded that the four
available studies did not indicate that BFRs are clinically
Table 5: Summary of study results for harms
Author, Year Campanini
1997[29]
Armstrong and
Ernst 2001[18]
Walach et. al.
2001[19]
Pintov et. al.
2005[20]
Howard 2007[8] Halberstein et.
al. 2007[3]
Study design Case series Placebo-controlled
RCT
Placebo-controlled
RCT
Placebo-controlled
trial
Case series RCT
N115 100 61 40 41 111
Adverse Events No AEs BFRs group:
3 AEs:
Headaches
Skin eruptions
1 reported AE
not specified
Not reported Not reported No AEs
Placebo group
3 AEs:
Vomiting before
the examination
Hayfever
symptoms
Depressive mood
AEs: Adverse Events
BMC Complementary and Alternative Medicine 2009, 9:16 http://www.biomedcentral.com/1472-6882/9/16
Page 11 of 12
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different to placebo for overdue birth, examination anxi-
ety and depression.[6] Our findings are consistent with
this review. In addition, we located several additional
studies that failed to demonstrate a benefit beyond the
placebo effect in examination anxiety and ADHD and we
provide the first summary of the evidence for the safety of
BFRs.
Conclusion
Our review demonstrates that the currently available evi-
dence indicates that BFRs are not more efficacious than a
placebo intervention for psychological problems but are
probably safe. Due to a lack of methodologically sound
trials, this statement is associated with a high level of
uncertainty. Recognising the need for evaluation of vari-
ous CAM practices, the US National Institute of Health
now provides over 121 million dollars of funding annu-
ally for evidence-based research into CAM via the
National Centre for Complementary and Alternative Med-
icine (NCCAM).[35] We recommend that future trials
employ methods that minimize bias and confounding
such as randomization and blinding; that trials are con-
ducted with an adequate sample size to be able to detect
effects with statistical significance; that attempts are made
to minimize loss-to-follow-up; and that patient-relevant
end-point parameters are analyzed.[28] Furthermore, we
think it appropriate and important for the applicability of
the evidence that adequate flexibility in personalising BFR
therapy and a suitable length of follow-up is allowed. We
look forward to this future good quality research that will
contribute to the evidence we have presented.
Competing interests
The authors declare that they have no competing interests.
Authors' contributions
KT coordinated the review, applied inclusion criteria,
extracted data and drafted the manuscript. AK applied
inclusion criteria, extracted data, and contributed to the
manuscript. AC performed the literature search and edited
the manuscript. TL applied inclusion criteria, extracted
data and was involved in the initial conception of the
review. GG participated in the design of the review, gave
methodological advice, and edited the manuscript. All
authors read and approved the final manuscript.
Additional material
Acknowledgements
The authors would like to thank Irene Wild for administrative assistance
and document retrieval.
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Additional file 1
Basic search strategy and terms used. This was adapted depending on
the database used. This file provides a more detailed description of the
search strategy and search terms.
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6882-9-16-S1.doc]
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Supplementary resource (1)

... These remedies are manufactured using two steps: first, obtain the "mother tincture" by placing a fresh flower into rock water with plenty of sunshine; second, add the first solution to brandy (alcoholic component). The products are based on a definite thirty-eight remedies (thirty-seven plants and rock water), which do not contain pharmacologically relevant active agents; however, they are scientifically unproven and believed to possess subtle forms of self-healing energy [35,36]. The remedies and the theory regarding this therapy were invented by the British physician Dr. Edward Bach in the 1930s, and they were recognized by the WHO in 1974 [2,36]. ...
... The products are based on a definite thirty-eight remedies (thirty-seven plants and rock water), which do not contain pharmacologically relevant active agents; however, they are scientifically unproven and believed to possess subtle forms of self-healing energy [35,36]. The remedies and the theory regarding this therapy were invented by the British physician Dr. Edward Bach in the 1930s, and they were recognized by the WHO in 1974 [2,36]. According to Bach's principles, BFRs can be used on any kind of medical condition; however, they are widely used in civilization-associated psychological problems, such as for treating stress and anxiety [36,37]. ...
... The remedies and the theory regarding this therapy were invented by the British physician Dr. Edward Bach in the 1930s, and they were recognized by the WHO in 1974 [2,36]. According to Bach's principles, BFRs can be used on any kind of medical condition; however, they are widely used in civilization-associated psychological problems, such as for treating stress and anxiety [36,37]. Dr. Bach distinguished seven emotional or personality groups, across which the thirty-eight flower essences are categorized, as depicted in Table 1 [36,38]. ...
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Introduction. The genus Impatiens L. includes about 850 species, which are found mainly in tropical and subtropical climate zones. The Indigenous people of Pakistan used pastes and extracts from I. glandulifera for the treatment of joint pain, anxiety and skin allergies [6]. Flowers of I. glandulifera are used in Bach flower remedies, which are used for sedation, relaxation and helping to balance emotional states. Aim. Isolation and structural elucidation of 11 phenolic constituents from the aerial parts of I. glandulifera and the evaluation of their antioxidant activity. Materials and methods. The aerial part of Impatiens glandulifera Royle was collected in the Leningrad region near the village of Orekhovo in 2021. Fractions were analyzed by analytical high performance liquid chromatography (HPLC) using a Prominence LC-20 (Shimadzu, Japan) equipped with a diode array detector. The isolation of individual compounds was carried out by column chromatography on open glass columns with sorbents of different selectivity, as well as by preparative HPLC using a Smartlina (Knauer, Germany) equipped with a spectrophotometric detector. The structure of isolated individual compounds was established by 1D and 2D NMR spectroscopy (Bruker Avance III 400 MHz, Germany). To study the antioxidant activity, we used solutions obtained by dissolving the isolated substances in a mixture of dimethyl sulfoxide and ethanol; an aqueous solution of vitamin C and an alcoholic solution of Trolox (Sigma-Aldrich, Japan). Result and discussion. Phytochemical analysis of the aerial parts of Impatiens glandulifera Royle. resulted in the isolation of 11 polyphenolic secondary metabolites ( 1-11 ) and their structures were elucidated. The antioxidant activity of all isolated compounds was evaluated. Conclusion. The maximum RAP values of eriodyctiol ( 3 ), kaempferol ( 1 ), and quercetin ( 2 ) did not differ significantly ( p = 0.585) from those of the comparator preparations: vitamin C and Trolox, which indicates that the antioxidant effect of these three isolated compounds is comparable to the well-known antioxidants. However, the semi-effective concentrations of these substances are two or more times lower ( p = 2.56 · 10 –4 ) comparted with vitamin C.
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Bach® Original Flower Essence (BFE) Rescue® Remedy, a modality used since 1930 but not yet thoroughly investigated scientifically, was evaluated for the reduction of acute situational stress. A double-blind clinical trial comparing a standard dosage of BFE Rescue Remedy against a placebo of identical appearance was conducted in a sample of 111 individuals aged 18 to 49, randomized into treatment (n = 53) and control (n = 58) groups. The Spielberger State-Trait Anxiety Inventory (STAI) was administered before and after the use of Rescue Remedy or placebo. Downward trends in anxiety level measurements were discovered in both the treatment (Rescue Remedy) and control (placebo) groups. Statistical analyses indicated that only the high-state anxiety treatment subgroup demonstrated a statistically significant difference between pretest and posttest scores. The results suggest that BFE Rescue Remedy may be effective in reducing high levels of situational anxiety.
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To describe the attitudes and behaviours regarding placebo treatments, defined as a treatment whose benefits derive from positive patient expectations and not from the physiological mechanism of the treatment itself. Cross sectional mailed survey. Physicians' clinical practices. 1200 practising internists and rheumatologists in the United States. Investigators measured physicians' self reported behaviours and attitudes concerning the use of placebo treatments, including measures of whether they would use or had recommended a "placebo treatment," their ethical judgments about the practice, what they recommended as placebo treatments, and how they typically communicate with patients about the practice. 679 physicians (57%) responded to the survey. About half of the surveyed internists and rheumatologists reported prescribing placebo treatments on a regular basis (46-58%, depending on how the question was phrased). Most physicians (399, 62%) believed the practice to be ethically permissible. Few reported using saline (18, 3%) or sugar pills (12, 2%) as placebo treatments, while large proportions reported using over the counter analgesics (267, 41%) and vitamins (243, 38%) as placebo treatments within the past year. A small but notable proportion of physicians reported using antibiotics (86, 13%) and sedatives (86, 13%) as placebo treatments during the same period. Furthermore, physicians who use placebo treatments most commonly describe them to patients as a potentially beneficial medicine or treatment not typically used for their condition (241, 68%); only rarely do they explicitly describe them as placebos (18, 5%). Prescribing placebo treatments seems to be common and is viewed as ethically permissible among the surveyed US internists and rheumatologists. Vitamins and over the counter analgesics are the most commonly used treatments. Physicians might not be fully transparent with their patients about the use of placebos and might have mixed motivations for recommending such treatments.
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Background: The Quality of Reporting of Meta-analyses (QUOROM) conference was convened to address standards for improving the quality of reporting of meta-analyses of clinical randomised controlled trials (RCTs). Methods: The QUOROM group consisted of 30 clinical epidemiologists, clinicians, statisticians, editors, and researchers. In conference, the group was asked to identify items they thought should be included in a checklist of standards. Whenever possible, checklist items were guided by research evidence suggesting that failure to adhere to the item proposed could lead to biased results. A modified Delphi technique was used in assessing candidate items. Findings: The conference resulted in the QUOROM statement, a checklist, and a flow diagram. The checklist describes our preferred way to present the abstract, introduction, methods, results, and discussion sections of a report of a meta-analysis. It is organised into 21 headings and subheadings regarding searches, selection, validity assessment, data abstraction, study characteristics, and quantitative data synthesis, and in the results with "trial flow", study characteristics, and quantitative data synthesis; research documentation was identified for eight of the 18 items. The flow diagram provides information about both the numbers of RCTs identified, included, and excluded and the reasons for exclusion of trials. Interpretation: We hope this report will generate further thought about ways to improve the quality of reports of meta-analyses of RCTs and that interested readers, reviewers, researchers, and editors will use the QUOROM statement and generate ideas for its improvement.
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This preliminary study examines the adjunctive use of flower essence therapy in the treatment of mild to moderate major depression. Flower essence therapy is similar to homeopathy in that it involves the ingesting of a substance which is physically dilute, but energetically active. Flower essences were prepared from a solar infusion of the fresh blossoms of plants. Twelve patients from 4 clinics around the United States were offered one month of "usual care," followed by three months of usual care plus flower essence therapy. Usual care for 11 of the 12 patients entailed psychotherapy, while 1 patient was offered nutritional support and counseling. The flower essence therapy was individualized and 60 different essences were used, with a mean of 8 flower essences given to a patient. The results of this study were measured using the Beck Depression Inventory (BDI) and the Hamilton Depressions Scale (HAMD). A time series analysis of the data was conducted using an ANOVA for repeated measures. The first month of usual care showed the BDI and HAMD to be unchanged. Flower essence therapy produced significant reductions of approximately 50% in both indices. The results strongly suggest that flower essences may be used adjunctively to facilitate the resolution of mild to moderate depression.
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The Cochrane Handbook for Systematic Reviews of Interventions (the Handbook) has undergone a substantial update, and Version 5 of the Handbook is now available online at www.cochrane-handbook.org and in RevMan 5. In addition, for the first time, the Handbook will soon be available as a printed volume, published by Wiley-Blackwell. We are anticipating release of this at the Colloquium in Freiburg. Version 5 of the Handbook describes the new methods available in RevMan 5, as well as containing extensive guidance on all aspects of Cochrane review methodology. It has a new structure, with 22 chapters divided into three parts. Part 1, relevant to all reviews, introduces Cochrane reviews, covering their planning and preparation, and their maintenance and updating, and ends with a guide to the contents of a Cochrane protocol and review. Part 2, relevant to all reviews, provides general methodological guidance on preparing reviews, covering question development, eligibility criteria, searching, collecting data, within-study bias (including completion of the Risk of Bias table), analysing data, reporting bias, presenting and interpreting results (including Summary of Findings tables). Part 3 addresses special topics that will be relevant to some, but not all, reviews, including particular considerations in addressing adverse effects, meta-analysis with non-standard study designs and using individual participant data. This part has new chapters on incorporating economic evaluations, non-randomized studies, qualitative research, patient-reported outcomes in reviews, prospective meta-analysis, reviews in health promotion and public health, and the new review type of overviews of reviews.
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Bach remedies were identified by Dr Edward Bach, a physician and homoeopath. Bach flower remedies consist of 38 remedies which are designed as a system of emotional healing. Remedies are dispensed in homoeopathic dosages, are safe and do not appear to interfere with any other medication. Nurses may find the remedies a useful adjunct to their nursing care.