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Advanced Pharmaceutical Bulletin
ISSN: 2228-5881      eISSN: 2251-7308  
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Submitted: 20 Apr 2013
Revised: 20 May 2013
First published online: 20 Aug 2013

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Adv Pharm Bull. 2013;3(2):419-424 doi: 10.5681/apb.2013.067
PMID:24312870        PMCID:PMC3848208

Thermal Analysis of Some Antidiabetic Pharmaceutical Compounds

Original Research

Ali Kamal Attia * , Magda Mohamed Ibrahim, Mohamed Abdel-Nabi El-ries

Purpose: Thermal behavior of some antidiabetic drugs such as pioglitazone hydrochloride (PTZ), rosiglitazone maleate (RGZ), glibenclamide (GBD) and glimepiride (GMP) has been studied. Methods: Thermogravimetric analysis (TGA), derivative thermogravimetry (DTG) and differential thermal analysis (DTA) techniques were used to study the thermal behavior of the drugs under investigation. Results: Thermal analysis technique was used to obtain quality control parameters such as melting point 193.13 °C, 122.42 °C, 173.75 °C and 208 °C for PTZ, RGZ, GBD and GMP, respectively. The values of melting point of gave satisfactory results in comparison to that obtained by using the official method. Non-isothermal methods were employed to determine the activation energy values of the first stage of thermal decomposition. Comparison of the activation energy values suggests the following sequence of thermal stability: GMP > GBD > RGZ > PTZ. Conclusion: The results obtained are useful for the identification of these compounds and permitted interpretations concerning their thermal decomposition. Thermal stability of pharmaceutical compounds can be studied and compared by using thermal analysis techniques.

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