Research Article
Rapid Screening and Quantitative Determination of Illegal Phosphodiesterase Type 5 Inhibitors (PDE-5i) in Herbal Dietary Supplements
Table 2
Result of screening PDE-5i in 92 samples.
| PDE-5i | Number of detected samples |
| Nortadalafil | 11 | Tadalafil | 10 | Sildenafil | 9 | Hydroxyhomosildenafil | 6 | Hydroxythiohomosildenafil | 6 | Homosildenafil | 6 | Thiohomosildenafil | 1 | Sildenafil N-oxyde | 2 | Chloropredadalafil | 1 | Propoxyphenyl-homohydroxysildenafil | 1 | Propoxyphenylaildenafil | 1 | Hydroxythiovardenafil | 1 | Methisosildenafil | 1 | N-hydroxyethyl dithio-desethyl carbodenafil | 2 |
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