Prescribing-label excerpts
Brimonidine Tartrate
Reference for: Brimonidine. Source presentation: solution/ drops. Source route: ophthalmic.
Mechanism of action
Brimonidine tartrate ophthalmic solution is a relatively selective alpha-2 adrenergic receptor agonist with a peak ocular hypotensive effect occurring at two hours post-dosing.
Fluorophotometric studies in animals and humans suggest that brimonidine tartrate has a dual mechanism of action by reducing aqueous humor production and increasing uveoscleral outflow.
Pharmacokinetics
Absorption — After ocular administration of either a 0.1% or 0.2% solution, plasma concentrations peaked within 0.5 to 2.5 hours and declined with a systemic half-life of approximately 2 hours.
Distribution — Brimonidine was approximately 29% bound to plasma proteins in healthy subjects.
Metabolism — In humans, brimonidine is extensively metabolized by the liver.
Excretion — Urinary excretion is the major route of elimination of brimonidine and its metabolites. Approximately 87% of an orally-administered radioactive dose of brimonidine was eliminated within 120 hours, with 74% found in the urine.
Selected passages from the cited U.S. prescribing label. The studies concern the source product and populations named in each passage; they do not establish Walter-product bioequivalence, an approved indication, or the kinetics of another fixed combination. Tables and the full prescribing information remain available in the source.
Source: DailyMed: Brimonidine Tartrate — solution/ drops
Reference accessed . Label revision: 2026-09-09.
