Drug reference
timolol
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Drug class
Cardiovascular (Beta Blockers)
Mechanism of action
Nonselective beta-adrenergic receptor blocker; reduces IOP by reducing production of aqueous humor
Common side effects
- Cataract
- Blurred vision
- Burning or stinging
- Conjunctivitis
- Decreased visual acuity
Boxed warnings
- May exacerbate ischemic heart disease following abrupt withdrawal Hypersensitivity to catecholamines has been observed during withdrawal Exacerbation of angina and, in some cases, myocardial infarction occurrence after abrupt discontinuation When discontinuing chronically administered beta-blockers (particularly with ischemic heart disease) gradually reduce dose over 1-2 wk and carefully monitor If angina markedly worsens or acute coronary insufficiency develops, reinstate beta-blocker administration promptly, at least temporarily (in addition to other measures appropriate for uns…
Contraindications
- Bronchial asthma/COPD Overt cardiac failure, sinus bradycardia, 2°/3° heart block, cardiogenic shock Hypersensitivity Sick sinus syndrome without permanent pacemaker
Related conditions
Frequently asked questions
What drug class is timolol?
timolol belongs to: Cardiovascular.
How does timolol work?
Nonselective beta-adrenergic receptor blocker; reduces IOP by reducing production of aqueous humor
What are the common side effects of timolol?
Cataract, Blurred vision, Burning or stinging, Conjunctivitis, Decreased visual acuity
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