(R)-Timolol is the (R)-enantiomer of non-selective Beta antagonist Timolol. (R)-Timolol is a ß-adrenergic blocking agent that binds only to nonspecific sites in the particulate fraction of the heart, lungs, and brain. (R)-Timolol is an antihypertensive agent that increases ocular blood flow and reduces intraocular pressure. (R)-Timolol is one of the impurities in commercial formulation of (S)-Timolol.