4ff962aa_The_North_Texas_Skeptic__Use_of_the_synthetic_drug
[Adulterant (Synthetic Drug)] Sildenafil (Viagra) [Number of samples examined] 81 [Number of positive results] 28 [Product claims] Products declared having the effect of improving sexual ability [Use of the synthetic drug] 
Drug used to treat erectile dysfunction and pulmonary arterial hypertension
The North Texas Skeptic
Use of the synthetic drug