title: The effect of latanoprost, bimatoprost, and travoprost on circadian variation of intraocular pressure in patients with open-angle glaucoma.
abstract: OBJECTIVE
  To evaluate the efficacy of latanoprost, bimatoprost, and travoprost given in the evening over the 24-hour curve in newly diagnosed open-angle glaucoma patients.
  
  
  METHODS
  This 8-week, randomized, parallel group, masked evaluator study compared the efficacy of once daily administration of latanoprost 0.005%, bimatoprost 0.03%, and travoprost 0.004% ophthalmic solutions. After enrollment at baseline, 48 patients were randomized to 3 treatment groups: latanoprost (n=17), bimatoprost (n=16), and travoprost (n=15). At baseline and 8 weeks of therapy, masked evaluators measured intraocular pressure (IOP) at 8 AM, 10 AM, 1 PM, 4 PM, 8 PM, 11 PM, and 3 AM.
  
  
  RESULTS
  Baseline mean IOP levels were similar across the groups. By week 8, reductions were observed in all 3 groups (P<0.001 for each). Travoprost-treated patients' IOP levels were reduced 8.7 and 8.1 mm Hg at 8 and 10 AM, respectively. Latanoprost-treated patients experienced 4.8 and 5.3 mm Hg reductions, whereas bimatoprost-treated patients experienced 5.5 and 4.9 mm Hg reductions at these time points. The amount of IOP reduction seen at 8 and 10 AM in travoprost group was significantly higher when compared with latanoprost and bimatoprost-treated group (P<0.001).
  
  
  CONCLUSIONS
  Latanoprost, bimatoprost, and travoprost were comparable in their ability to reduce IOP in open-angle glaucoma patients. On the basis of our data, the IOP reduction of these drugs is indistinguishable within statistical parameters.
authors.affiliation: Department of Ophthalmology, Eskisehir Osmangazi University Hospital, Eskisehir, Turkey. nyyildirim@yahoo.com
authors.forename: Nilgun
authors.initials: N
authors.lastname: Yildirim
authors.forename: Afsun
authors.initials: A
authors.lastname: Sahin
authors.forename: Saadet
authors.initials: S
authors.lastname: Gultekin
mesh_terms: D000577:Amides / Q000008:administration & dosage*; D000959:Antihypertensive Agents / Q000008:administration & dosage*; D000069580:Bimatoprost; D002940:Circadian Rhythm / Q000187:drug effects*; D003008:Cloprostenol / Q000008:administration & dosage / Q000031:analogs & derivatives*; D004311:Double-Blind Method; D005260:Female; D005902:Glaucoma, Open-Angle / Q000188:drug therapy*; D006068:Gonioscopy; D006801:Humans; D007429:Intraocular Pressure / Q000187:drug effects*; D000077338:Latanoprost; D008055:Lipids / Q000008:administration & dosage*; D008297:Male; D008875:Middle Aged; D009883:Ophthalmic Solutions / Q000008:administration & dosage; D011461:Prostaglandins F, Synthetic / Q000008:administration & dosage*; D014065:Tonometry, Ocular; D000069557:Travoprost; D016896:Treatment Outcome
chemical_list: D000577:Amides; D000959:Antihypertensive Agents; D008055:Lipids; D009883:Ophthalmic Solutions; D011461:Prostaglandins F, Synthetic; D003008:Cloprostenol; D000077338:Latanoprost; D000069580:Bimatoprost; D000069557:Travoprost