title: Caution about club drugs and Viagra.
mesh_terms: D004347:Drug Interactions; D018451:Homosexuality, Male; D006801:Humans; D013287:Illicit Drugs / Q000009:adverse effects*; D008297:Male; D010726:Phosphodiesterase Inhibitors / Q000009:adverse effects*; D010879:Piperazines / Q000009:adverse effects*; D011687:Purines; D000068677:Sildenafil Citrate; D013450:Sulfones
chemical_list: D013287:Illicit Drugs; D010726:Phosphodiesterase Inhibitors; D010879:Piperazines; D011687:Purines; D013450:Sulfones; D000068677:Sildenafil Citrate