title: PDE5 inhibitors for erectile dysfunction revisited.
mesh_terms: D000818:Animals; D007172:Erectile Dysfunction / Q000188:drug therapy* / Q000378:metabolism; D006261:Headache / Q000139:chemically induced / Q000378:metabolism; D006801:Humans; D008297:Male; D058986:Phosphodiesterase 5 Inhibitors / Q000009:adverse effects / Q000378:metabolism / Q000627:therapeutic use*; D010879:Piperazines / Q000009:adverse effects / Q000378:metabolism / Q000627:therapeutic use; D011687:Purines / Q000009:adverse effects / Q000378:metabolism / Q000627:therapeutic use; D000068677:Sildenafil Citrate; D013450:Sulfones / Q000009:adverse effects / Q000378:metabolism / Q000627:therapeutic use
chemical_list: D058986:Phosphodiesterase 5 Inhibitors; D010879:Piperazines; D011687:Purines; D013450:Sulfones; D000068677:Sildenafil Citrate