title: Ask the doctor. A few years ago, I had a heart attack. My doctor treated me with angioplasty, and I haven't had any symptoms of heart disease since. I do carry a bottle nitroglycerin with me, but haven't taken any in years. I renew my prescription every six months because I know the pills go bad. My problem is that I also need Viagra to have sexual intercourse. Whenever I refill my prescription for Viagra, the pharmacist gives me a hard time because he knows I also have a prescription for nitroglycerin. Just how dangerous is Viagra?
authors.forename: T H
authors.initials: TH
authors.lastname: Lee
mesh_terms: D015106:3',5'-Cyclic-GMP Phosphodiesterases / Q000037:antagonists & inhibitors; D004357:Drug Synergism; D006801:Humans; D007022:Hypotension / Q000139:chemically induced*; D008297:Male; D005996:Nitroglycerin / Q000009:adverse effects*; D010726:Phosphodiesterase Inhibitors / Q000009:adverse effects*; D010879:Piperazines / Q000009:adverse effects*; D011687:Purines; D000068677:Sildenafil Citrate; D013450:Sulfones
chemical_list: D010726:Phosphodiesterase Inhibitors; D010879:Piperazines; D011687:Purines; D013450:Sulfones; D000068677:Sildenafil Citrate; D015106:3',5'-Cyclic-GMP Phosphodiesterases; D005996:Nitroglycerin