title: The effect of d-timolol on intraocular pressure in patients with ocular hypertension.
abstract: The stereoisomer form of timolol used in the treatment of glaucoma is l-timolol. Although d-timolol is a less potent beta-adrenergic receptor blocker than l-timolol, several laboratory studies have found that d-timolol has ocular hypotensive effects. Thus, d-timolol may be a useful therapeutic agent for glaucoma that has fewer systemic side effects than l-timolol. We conducted a randomized, double-masked, single-drop study of the effects of d-timolol and placebo on intraocular pressure in 34 patients with ocular hypertension. d-Timolol significantly lowered intraocular pressure for the six-hour duration of the study. No patients receiving the drug reported subjective side effects. There was no change in visual acuity, pupil size, or results of external ocular or slit-lamp examinations during the study. No changes in pulse rate or blood pressure were attributable to the drug.
mesh_terms: D000287:Administration, Topical; D000328:Adult; D000368:Aged; D001794:Blood Pressure / Q000187:drug effects; D004311:Double-Blind Method; D004341:Drug Evaluation; D005123:Eye / Q000187:drug effects; D005260:Female; D006339:Heart Rate / Q000187:drug effects; D006801:Humans; D007429:Intraocular Pressure / Q000187:drug effects*; D008297:Male; D008875:Middle Aged; D009798:Ocular Hypertension / Q000188:drug therapy*; D009883:Ophthalmic Solutions; D011680:Pupil / Q000187:drug effects; D011897:Random Allocation; D013237:Stereoisomerism; D013999:Timolol / Q000008:administration & dosage / Q000627:therapeutic use*; D014792:Visual Acuity / Q000187:drug effects
chemical_list: D009883:Ophthalmic Solutions; D013999:Timolol