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