title: Comparison of the effects of latanoprost, travoprost, and bimatoprost on circadian intraocular pressure in patients with glaucoma or ocular hypertension.
abstract: OBJECTIVE
  To compare 24-hour reduction in intraocular pressure (IOP) by latanoprost 0.005%, travoprost 0.004%, and bimatoprost 0.03% in patients with primary open-angle glaucoma (POAG) or ocular hypertension (OH).
  
  
  METHODS
  Randomized, double-masked, crossover study.
  
  
  METHODS
  Twenty-four patients with POAG and 20 with OH.
  
  
  METHODS
  Patients were treated with latanoprost, travoprost, and bimatoprost for 1 month. The treatment sequence was randomized, and washout lasted 30 days for each trial drug. Four 24-hour tonometric curves were recorded for each patient: 1 at baseline and 1 after each treatment period.
  
  
  METHODS
  Intraocular pressure was measured at 3, 6, and 9 am; noon; 3, 6, and 9 pm; and midnight by 2 treatment-masked well-trained evaluators using a handheld electronic tonometer with the patient in supine and sitting positions and a Goldmann applanation tonometer with the patient sitting at the slit lamp. Supine systemic blood pressure was recorded at the same times. A randomized-blocks analysis of variance was used to analyze data.
  
  
  RESULTS
  All 3 drugs were highly effective in reducing IOP when compared to baseline. Mean IOP reductions were similar after the 3 prostaglandin analogs, and none of the differences among treatments reached statistical significance. The drugs' effect was significantly greater during the daytime (9 am-9 pm) than during the nighttime (midnight-6 am) with all prostaglandin analogs. In 7 of 44 patients (16%), nocturnal IOP was significantly higher than diurnal IOP, both at baseline and under the 3 prostaglandin analogs.
  
  
  CONCLUSIONS
  From a clinical point of view, the overall results seem to indicate that the 3 prostaglandin analogs are powerful agents in controlling round-the-clock IOP in POAG and OH patients.
authors.affiliation: Eye Clinic, Department of Medicine, Surgery and Odontoiatry, University of Milan San Paolo Hospital, Milan, Italy.
authors.forename: Nicola
authors.initials: N
authors.lastname: Orzalesi
authors.forename: Luca
authors.initials: L
authors.lastname: Rossetti
authors.forename: Andrea
authors.initials: A
authors.lastname: Bottoli
authors.forename: Paolo
authors.initials: P
authors.lastname: Fogagnolo
mesh_terms: D000368:Aged; D000577:Amides; D000959:Antihypertensive Agents / Q000008:administration & dosage / Q000627:therapeutic use*; D000069580:Bimatoprost; D001794:Blood Pressure / Q000187:drug effects; D002940:Circadian Rhythm / Q000187:drug effects*; D003008:Cloprostenol / Q000008:administration & dosage / Q000031:analogs & derivatives* / Q000627:therapeutic use; D018592:Cross-Over Studies; D004311:Double-Blind Method; D005260:Female; D005902:Glaucoma, Open-Angle / Q000188:drug therapy* / Q000503:physiopathology; D006801:Humans; D007429:Intraocular Pressure / Q000187:drug effects* / Q000502:physiology; D000077338:Latanoprost; D008055:Lipids / Q000008:administration & dosage / Q000627:therapeutic use*; D008297:Male; D009798:Ocular Hypertension / Q000188:drug therapy / Q000503:physiopathology; D009883:Ophthalmic Solutions / Q000008:administration & dosage / Q000627:therapeutic use; D011461:Prostaglandins F, Synthetic / Q000008:administration & dosage / Q000627:therapeutic use*; D014065:Tonometry, Ocular; D000069557:Travoprost
chemical_list: D000577:Amides; D000959:Antihypertensive Agents; D008055:Lipids; D009883:Ophthalmic Solutions; D011461:Prostaglandins F, Synthetic; D003008:Cloprostenol; D000077338:Latanoprost; D000069580:Bimatoprost; D000069557:Travoprost