title: Effect of beta-blockers on exercise double product (systolic blood pressure x heart rate).
abstract: 1 The effect of single oral doses of six beta-receptor antagonists on exercise-induced changes in double product (systolic blood pressure x heart rate) were studied in 25 human volunteers. 2 Three doses of propranolol, nadolol, oxprenolol, pindolol, timolol and atenolol were selected for study on the basis of in vivo beta-blocking potency. 3 Although all beta-blockers studied reduced the double product response to exercise, the pharmacodynamics of this effect differed markedly. 4 Pharmacodynamic half-lives, estimated for the drug tested, were 39 h for nadolol, atenolol 21 h, timolol 15 h, oxprenolol 13 h, propranolol 11 and pindolol 8 h. 5 These results suggest that the clinical choice of a beta-blocker with the least problems of compliance can be made on the basis of pharmacodynamics as well as pharmacological profile.
mesh_terms: D000293:Adolescent; D000319:Adrenergic beta-Antagonists / Q000494:pharmacology* / Q000627:therapeutic use; D000328:Adult; D001262:Atenolol / Q000494:pharmacology; D001794:Blood Pressure / Q000187:drug effects*; D004341:Drug Evaluation; D006339:Heart Rate / Q000187:drug effects*; D006801:Humans; D007700:Kinetics; D008297:Male; D008875:Middle Aged; D010096:Oxprenolol / Q000494:pharmacology; D005082:Physical Exertion; D010869:Pindolol / Q000494:pharmacology; D011412:Propanolamines / Q000494:pharmacology* / Q000627:therapeutic use; D011433:Propranolol / Q000494:pharmacology; D013997:Time Factors; D013999:Timolol / Q000494:pharmacology
chemical_list: D000319:Adrenergic beta-Antagonists; D011412:Propanolamines; D001262:Atenolol; D010096:Oxprenolol; D013999:Timolol; D011433:Propranolol; D010869:Pindolol