Viagra, the latest cardio-VASCULAR drug.
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D002319:Cardiovascular System / Q000187:drug effects; D000075202:Contraindications; D004347:Drug Interactions; D004791:Enzyme Inhibitors / Q000494:pharmacology / Q000627:therapeutic use*; D007172:Erectile Dysfunction / Q000175:diagnosis / Q000188:drug therapy*; D006801:Humans; D008099:Liver / Q000201:enzymology; D008297:Male; D009566:Nitrates / Q000494:pharmacology; D010879:Piperazines / Q000494:pharmacology / Q000627:therapeutic use*; D011687:Purines; D000068677:Sildenafil Citrate; D013450:Sulfones
D004791:Enzyme Inhibitors; D009566:Nitrates; D010879:Piperazines; D011687:Purines; D013450:Sulfones; D000068677:Sildenafil Citrate