[Show abstract][Hide abstract] ABSTRACT: The huge number of drug interactions makes it impossible to memorize them all. Detecting them and preventing adverse effects requires the use of reference works or databases. There are numerous discordances between the so-called "reference" books and databases. Nonexistent and unconfirmed interactions are published. The wording of the "drug interactions" section of the summary of product characteristics (SCP) sometimes sheds very little light on the risks involved. The delay by AFSSAPS in updating its drug interaction thesaurus may present problems in clinical practice. It is essential to know the limitations of the computerized systems for detecting and reporting drug interactions.
[Show abstract][Hide abstract] ABSTRACT: Objectives:
Drug interactions occur when effects and/or toxicity of a drug are affected by presence of another drug. They are usually unpredictable and undesirable. A study was conducted to verify the prevalence and clinical value of potential drug interactions in intensive care units METHODS: All patients, of three intensive care units were included in a cross-sectional study, over a period of two months. Patients with less than a 2 days length of stay were excluded. Data were collected from twenty-four hour prescriptions and all possible paired combinations drug-drug were recorded. Prevalence and clinical value (significance) were checked at the end of follow-up.
One hundred and forty patients were analyzed, 67.1% presented with some significant potential drug interactions and of the 1069 prescriptions, 39.2% disclosed the same potential. Of 188 different potential drug interactions, 29 were considered highly significant. Univariate analysis showed that in the group with significant potential drug interactions a higher number of different drugs, drugs/day had been used, there were more prescribing physicians and extended stay in intensive care units. Adjusted to the multivariate logistic regression model, only the number of drugs/day correlated with increased risk of significant potential drug interaction (p = 0.0011) and, furthermore that use of more than 6 drugs/day increased relative risk by 9.8 times.
Critically ill patients are submitted to high risk of potential drug interactions and the number of drugs/day has a high positive predictive value for these interactions. Therefore, it is imperative that critical care physicians be constantly alert to recognize this problem and provide appropriate mechanisms for management, thereby reducing adverse outcomes.
Revista Brasileira de Terapia Intensiva 11/2008; 20(4):2008.
Data provided are for informational purposes only. Although carefully collected, accuracy cannot be guaranteed. The impact factor represents a rough estimation of the journal's impact factor and does not reflect the actual current impact factor. Publisher conditions are provided by RoMEO. Differing provisions from the publisher's actual policy or licence agreement may be applicable.