[mass noun] A synthetic compound which acts as a beta blocker and is used to treat hypertension, migraine, and glaucoma.
- ‘The beta blockers, including propranolol, nadolol, atenolol, metoprolol, and timolol, are effective but may cause fatigue, sleep disorders, and decreased exercise tolerance.’
- ‘One researcher found topical use of the betablocker, timolol, did not work as well in the evening.’
- ‘There is good evidence for the efficacy of propranolol and timolol.’
- ‘The beta-blocker medication timolol may have significant cardiac side effects, including bradycardia and heart failure.’
- ‘On the other hand, absence of evidence of effectiveness is not the same as evidence of absence of effectiveness, and atenolol may, in reality, be as effective as propranolol or timolol.’
1970s: from tim- (of unknown origin) + (propran)olol.