title: The effect of propranolol on the rise in plasma ammonia during modest exercise.
abstract: Changes in plasma ammonia in response to exercise with and without pretreatment with propranolol have been studied. A standardised submaximal treadmill exercise test was used to assess the effects of placebo or propranolol 40 mg, 80 mg, or 160 mg twice daily given in random order for 3 days, the last dose being taken 90 min before exercise. After placebo the mean incremental rise in plasma ammonia in response to exercise was 16 mumol X 1(-1). The corresponding rise after propranolol 40 mg was 56 mumol X 1(-1) (p less than 0.01). All three doses of propranolol produced similar effects on plasma ammonia and exercise heart rates.
mesh_terms: D000293:Adolescent; D000328:Adult; D000641:Ammonia / Q000097:blood*; D004562:Electrocardiography; D006339:Heart Rate / Q000187:drug effects; D006801:Humans; D008297:Male; D005082:Physical Exertion; D011433:Propranolol / Q000494:pharmacology*
chemical_list: D000641:Ammonia; D011433:Propranolol