4.3 Article

Quantitative Analysis of Sildenafil and Tadalafil in Various Fake Drugs Recently Distributed in Korea

期刊

JOURNAL OF FORENSIC SCIENCES
卷 57, 期 6, 页码 1637-1640

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WILEY
DOI: 10.1111/j.1556-4029.2012.02164.x

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forensic science; sildenafil; tadalafil; counterfeit drugs; quantitative analysis; high-performance liquid chromatography; Korea

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Illicit distribution of various illicit or counterfeit drugs containing sildenafil and tadalafil has increased and caused noticeable problems in Korea. This study has been performed to determine the content range of sildenafil and tadalafil in various fake drugs. Among the illicit or counterfeit drugs seized by Korean authorities, 105 exhibits were used for the quantification. HPLCUV analysis of methanol extractions was used for separation and quantitation of the two target compounds. The most abundant type of fake drug was counterfeit Viagra (R) tablets. Sildenafil was found in 73 exhibits, and tadalafil was found in seven exhibits. Twenty-five exhibits out of the 105 contained both sildenafil and tadalafil. The contents of sildenafil ranged from 4.3 to 453.2 mg; for tadalafil, the range was 2.240.4 mg. The proportion of cases of having more than 100 mg of sildenafil was 50% and 78% had more than 20 mg of tadalafil.

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