title: Alternatives to viagra.
authors.forename: Harvey B
authors.initials: HB
authors.lastname: Simon
mesh_terms: D003376:Counseling; D007172:Erectile Dysfunction / Q000188:drug therapy / Q000628:therapy*; D006801:Humans; D008297:Male; D015917:Penile Prosthesis; D010879:Piperazines / Q000627:therapeutic use; D011687:Purines; D000068677:Sildenafil Citrate; D013450:Sulfones; D014619:Vacuum Curettage
chemical_list: D010879:Piperazines; D011687:Purines; D013450:Sulfones; D000068677:Sildenafil Citrate