title: Viagra: the science and politics of drugs, sex, and risk.
authors.forename: Lisa
authors.initials: L
authors.lastname: Loeb
mesh_terms: D000328:Adult; D000368:Aged; D007172:Erectile Dysfunction / Q000188:drug therapy*; D015658:HIV Infections / Q000635:transmission; D006801:Humans; D008297:Male; D008875:Middle Aged; D010879:Piperazines / Q000009:adverse effects / Q000627:therapeutic use*; D011687:Purines; D012307:Risk Factors; D012725:Sexual Behavior; D000068677:Sildenafil Citrate; D013450:Sulfones
chemical_list: D010879:Piperazines; D011687:Purines; D013450:Sulfones; D000068677:Sildenafil Citrate