Brimonidine is available in which concentrations?

• A. 0.15%, 0.2%
• B. 0.3%, 0.4%
• C. 0.05%, 0.1%
• D. 1%, 2%

Answer: (A)

Brimonidine eye drops are formulated at two standard strengths to balance efficacy and tolerability: 0.15% and 0.2%. This alpha-2 agonist lowers intraocular pressure primarily by reducing aqueous humor production. The two concentrations give clinicians flexibility—some patients may tolerate the higher 0.2% better or require it for more robust IOP lowering, while others do well on the 0.15% with potentially fewer systemic or local side effects. The other listed concentrations are not typical for brimonidine ophthalmic solutions, so knowing these two standard strengths reflects what you’ll actually encounter in practice.