title: Reply to "Viagra: the risks of recreational use".
authors.forename: Sam J
authors.initials: SJ
authors.lastname: Sugar
mesh_terms: D005260:Female; D006801:Humans; D008297:Male; D010353:Patient Education as Topic; D010726:Phosphodiesterase Inhibitors; D010879:Piperazines; D011687:Purines; D012725:Sexual Behavior; D012749:Sexually Transmitted Diseases; D000068677:Sildenafil Citrate; D019966:Substance-Related Disorders; D013450:Sulfones
chemical_list: D010726:Phosphodiesterase Inhibitors; D010879:Piperazines; D011687:Purines; D013450:Sulfones; D000068677:Sildenafil Citrate