Mohammad Reza Siahi-Shadbad

Mohammad Reza Siahi-Shadbad
Tabriz University of Medical Sciences | TBZMED · Department of Pharmaceutical and Food Control

Full Professor,PHD,Pharm.D,MBA

About

32
Publications
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1,925
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Publications

Publications (32)
Article
Full-text available
Tacrolimus is an immunosuppressive drug widely used in organ or tissue transplantation. Furthermore, its anti-inflammatory effects are employed in treatments for psoriasis, uveitis, and vernal keratoconjunctivitis. According to the structural characteristics of tacrolimus, different transformations can be occurred on the drug and produces degradati...
Article
Background: Kinetic evaluation of drugs and excipients interaction provides useful information about the compatibility, stability and desired storage condition of the final formulation in pharmaceutical manufacturing industries. Methods: In the present study the physicochemical incompatibility of alprazolam with lactose was evaluated in solid state...
Article
Full-text available
In this study the stability of parenteral acyclovir (ACV) when diluted in dextrose (DEX) as large volume intravenous fluid preparation (LVIF) was evaluated and the possible Maillard reaction adducts were monitored in the recommended infusion time. Different physicochemical methods were used to evaluate the Maillard reaction of dextrose with ACV to...
Article
In the present paper, the physicochemical incompatibility of doxepin with dextrose was evaluated in solid-state mixtures. The compatibility was evaluated using different physicochemical methods such as differential scanning calorimetry (DSC), Fourier transform infrared spectroscopy and mass spectrometry. Non-isothermally stressed physical mixtures...
Article
In this study, the incompatibility of doxepin in solid physical mixtures with lactose (monohydrate and anhydrous) was investigated. The compatibility testing was made using various physicochemical techniques, such as differential scanning calorimetry (DSC), Fourier-transform infrared (FTIR) spectroscopy, and mass spectrometry. Non-isothermally stre...
Article
Background: In the present research the incompatibility of doxepin in solid physical mixtures with sucrose as a common pharmaceutical excipient was studied. Methods: Differential scanning calorimetry (DSC) and Fouriertransform infrared (FTIR) spectroscopy were used for the characterization of the doxepin-sucrose incompatibility. Solidstate kinetic...
Article
Full-text available
Purpose: The purpose of this study was to prepare and characterize solid dispersion formulation of furosemide to enhance dissolution rate. Methods: Solid dispersions with different drug: carrier ratios were prepared by cogrinding method using crospovidone and microcrystalline cellulose as carrier. The physical state and interactions between the...
Article
Full-text available
Introduction: The main objective of this study was preparation and characterization of solid dispersion of piroxicam to enhance its dissolution rate. Methods: Solid dispersion formulations with different carriers including crospovidone, microcrystalline cellulose, Elaeagnus angustifolia fruit powder, with different drug to carrier ratios were prep...
Article
Full-text available
Purpose: Aflatoxins (AFs) are a group of mycotoxins and secondary metabolites of various species of Aspergillus. There are various forms of aflatoxins including B1, B2, G1, G2, M1 and M2 types. Aflatoxins cause important health problems and have high potential effect on liver cancer. Therefore, numerous investigations have been conducted during la...
Article
The aim of this study was to investigate the applicability of microspheres containing protease inhibitor for oral delivery of insulin (CAS 9004-10-8). Microspheres of insulin were prepared by water-in-oil-in-oil (w/o1/o2) double emulsion solvent evaporation method. Formulations with different drug/polymer ratios were prepared and characterized by d...
Article
Full-text available
The objective of this study was to investigate the release behaviour of propranolol hydrochloride from psyllium matrices in the presence hydrophilic polymers. The dissolution test was carried out at pH 1.2 and pH 6.8. Binary mixtures of psyllium and hydroxypropyl methylcellulose (HPMC) used showed that an increase in the percentage of HPMC in the b...
Article
Full-text available
In the following study several techniques are utilized such as Differential Scanning Calorimetery (DSC), Infra-Red (IR) spectroscopy, High Performance Liquid Chromatography (HPLC) and Liquid Chromatography-Mass Spectrometry/Mass Spectrometry (LC-MS/MS) to characterize gabapentin (GBP) and lactose incompatibility in solid state binary mixtures and a...
Article
Full-text available
Insulin is a polypeptide hormone and usually administered for treatment of diabetic patients subcutaneously. The aim of this study was to investigate the efficiency of enteric nanoparticles for oral delivery of insulin. Nanoparticles were formed by complex coacervation method using chitosan of various molecular weights. Nanoparticles were character...
Article
Full-text available
A physically sound derivation for reciprocal power time (RPT) model for kinetic of drug release is given. In order to enhance ibuprofen dissolution, its solid dispersions (SDs) prepared by cogrinding technique using crospovidone (CP), microcrystalline cellulose (MC) and oleaster powder (OP) as a novel carrier and the model applied to the drug relea...
Article
Gliclazide is practically insoluble in water. In order to improve the drug dissolution rate, cogrinding method was used as an approach to prepare gliclazide coground/solid dispersions (SDs) in the carriers such as povidone (PVP-K30), crospovidone and microcrystalline cellulose (Avicel PH 101) with different drug to carrier ratios. The dissolution r...
Article
Full-text available
This study documents drug-excipient incompatibility studies of acyclovir in physical mixtures with lactose and in different tablet brands. Differential scanning calorimetry (DSC) was initially used to assess compatibility of mixtures. The Fourier-transform infrared (FTIR) spectrum was also compared with the spectra of pure drug and excipient. Altho...
Article
Full-text available
The aim of this study was to determine any possible, baclofen-lactose Maillard reaction products. Granules and tablets of baclofen and lactose were prepared and maintained in heat ovens for a certain time period. The effects of lactose type, addition of magnesium stearate, and water were monitored. Heated lactose and baclofen were analyzed using re...
Article
Background and purpose of the study: Several methods are available for control release of propranolol hydrochloride (PLH). The aim of the present study was to develop a novel technique to sustain PLH release from matrices. Materials and methods: Matrices of PLH containing sodium carboxymethylcellulose (Na CMC) and various amounts of the inorganic c...
Article
Objectives: Nanotechnology will affect human being life impressively over the next decade in different fields, including medicine and pharmacy. Polymeric nanoparticles have been far and wide studied as particulate carriers in the pharmaceutical and medical fields since they show promise as drug delivery systems on account of their controlled and su...
Article
Full-text available
Comparative drug release kinetics from nanoparticles was carried out using conventional and our novel models with the aim of finding a general model applicable to multi mechanistic release. Theoretical justification for the two best general models was also provided for the first time. Ten conventional models and three models developed in our labora...
Article
To investigate the anti-inflammatory impacts of piroxicam nanosuspension, in the current investigation, piroxicam:Eudragit RS100 nanoformulations were used to control inflammatory symptoms in the rabbits with endotoxin-induced uveitis (EIU). The nanoparticles of piroxicam:Eudragit RS100 was formulated using the solvent evaporation/extraction techni...
Article
Full-text available
Carbamazepine belongs to the class II biopharmaceutical classification system (BCS) which is characterized by a high per-oral dose, a low aqueous solubility and a high membrane permeability. The bioavailability of such a drug is limited by the dissolution rate. In order to increase the drug dissolution, its solid dispersions were prepared by the co...
Article
Benzoyl peroxide (BPO) is commonly used in topical formulations for the treatment of acne and athletes foot. Skin irritation is a common side effect, and it has been shown that controlled release of BPO from a delivery system to the skin could reduce the side effect while reducing percutaneous absorption. Therefore, the aim of the present study was...
Article
Piroxicam is a poorly soluble, highly permeable drug and the rate of its oral absorption is often controlled by the dissolution rate in the gastrointestinal. The poor dissolution rate of water-insoluble drugs is still a major problem confronting the pharmaceutical industry. There are several techniques to enhance the dissolution of poorly soluble d...
Article
Full-text available
For poorly soluble, highly permeable (Class II) drugs, such as indomethacin, the rate of oral absorption is often controlled by the dissolution rate in the gastrointestinal tract. Therefore together with the permeability, the solubility and dissolution behaviour of a drug are key determinants of its oral bioavailability. The object of the present s...
Article
Full-text available
Benzoyl peroxide (BPO) is a first-line topical treatment in acne vulgaris, and it is superior to antibiotics, because the bacteria do not develop resistance to it. Skin irritation is a common side effect, and it has been shown that controlled release of BPO from a delivery system to the skin could reduce the side effects while reducing percutaneous...
Article
Benzoyl peroxide (BPO) is commonly used in topical formulations for the treatment of acne and athletes foot. Skin irritation is a common side effect, and it has been shown that controlled release of BPO from a delivery system to the skin could reduce the side effect while reducing percutaneous absorption. Therefore, the aim of the present study was...
Article
Full-text available
The objective of this study is to investigate the effect of various polymers, and fillers, and their concentrations on the release rate of atenolol from polymeric matrices. Four polymers namely hydroxypropylmethylcellulose (HPMC), Eudragit RSPO, ethylcellulose (EC) and sodium carboxymethylcellulose (NaCMC) were used. The dissolution profiles showed...
Article
The buccal mucosa has been investigated for local and systemic delivery of therapeutic peptides and other drugs that are subjected to first-pass metabolism or are unstable within the rest of the gastrointestinal tract. Propranolol hydrochloride (propranolol HCl) is subjected to first-pass effect, therefore formulation of buccal-adhesive dosage form...
Article
Full-text available
The effect of various surfactants, the particle size of carbamazepine and compression pressure on the drug release rate from hydroxypropyl methylcellulose matrices were evaluated. The results showed that sodium lauryl sulfate (1% w/w) significantly increased the release of the drug, whereas above 1% w/w, the release rate decreased. This decrease in...
Article
It is possible to release a drug with only limited diffusion from a membrane-coated system using osmotic pumping. In this study, a propranolol osmotic pump was produced by coating the core tablets with cellulose acetate. The effects of membrane thickness, pore size, and stirring rate on the release rate of propranolol hydrochloride were studied. It...

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