title: A study of cross-tolerance to circulatory effects of organic nitrates.
mesh_terms: D000328:Adult; D001794:Blood Pressure / Q000187:drug effects*; D004361:Drug Tolerance; D005260:Female; D006261:Headache / Q000139:chemically induced; D006339:Heart Rate / Q000187:drug effects*; D006801:Humans; D008297:Male; D008875:Middle Aged; D005996:Nitroglycerin / Q000494:pharmacology*; D010417:Pentaerythritol Tetranitrate / Q000494:pharmacology; D011674:Pulse / Q000187:drug effects*
chemical_list: D010417:Pentaerythritol Tetranitrate; D005996:Nitroglycerin