Abstract

Counterfeiting of pharmaceutical products is a global problem. Upon using quality-ensuring methods of international pharmacopoeias, additional impurities and the low content of the active pharmaceutical ingredients were detected. In this paper, two chromatographic HPLC and TLC-densitometric methods were proposed as fast and reliable methods for detection and quantitation of counterfeit Plavix® tablets. These tablets were chemically counterfeited by aspirin, its degradate salicylic acid and metronidazole which were separated, besides the active ingredient clopidogrel bisulfate, by the proposed methods. Also, counterfeit was in packaging, strips and tablets’ color and these could be seen by visual inspection compared to original drug. The proposed methods can easily differentiate genuine from counterfeited tablets without need of prior separation. The proposed methods were validated according to ICH guidelines and applied to eleven batches, also were compared statistically with the reported one.

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