title: Latanoprost 0.005% versus bimatoprost 0.03% in primary open-angle glaucoma patients.
abstract: OBJECTIVE
  To evaluate latanoprost versus bimatoprost given each evening over the 24-hour diurnal curve.
  
  
  METHODS
  Double-masked, 2-center, crossover comparison.
  
  
  METHODS
  Forty-two of 44 patients with primary open-angle glaucoma (POAG) completed the study.
  
  
  METHODS
  Consecutive patients were not treated during a baseline 24-hour curve after a glaucoma medicine-free period. They then were randomized to either latanoprost or bimatoprost for a 7-week treatment period. Diurnal curve intraocular pressures (IOPs) were measured at treatment period end at 2 am, 6 am, 10 am, 2 pm, 6 pm, and 10 pm. After the first treatment period, patients were changed to the opposite medicine without a medicine-free period. Diurnal curve measurements were performed again at the end of the second 7-week treatment period.
  
  
  METHODS
  The 24-hour diurnal IOP.
  
  
  RESULTS
  On the last day of treatment, mean 24-hour IOPs were 17.3+/-2.8 mmHg for latanoprost and 16.7+/-2.4 mmHg for bimatoprost (P = 0.01). The 6 pm individual time point for IOP was statistically lower for bimatoprost after a Bonferroni correction (P = 0.008). The largest IOP difference at any time point was 0.9 mmHg at 6 pm. The most common side effect was conjunctival hyperemia, which occurred less with latanoprost (n = 6) than with bimatoprost (n = 15) (P = 0.004). Two patients had their treatments discontinued while on bimatoprost, one due to conjunctival hyperemia and the other due to ocular intolerance.
  
  
  CONCLUSIONS
  This study indicates that the 24-hour diurnal IOP is statistically lower in POAG with bimatoprost, compared with latanoprost, among patients who tolerated bimatoprost. However, the IOP difference between groups was small and may not be clinically meaningful. In contrast, conjunctival hyperemia seems statistically greater with bimatoprost. The exact clinical importance of conjunctival hyperemia, if any, needs to be clarified further.
authors.affiliation: Glaucoma Unit, University Department of Ophthalmology, AHEPA Hospital, Thessaloniki, Greece.
authors.forename: Anastasios G P
authors.initials: AG
authors.lastname: Konstas
authors.forename: John M
authors.initials: JM
authors.lastname: Katsimbris
authors.forename: Nikolaos
authors.initials: N
authors.lastname: Lallos
authors.forename: George P
authors.initials: GP
authors.lastname: Boukaras
authors.forename: Jessica N
authors.initials: JN
authors.lastname: Jenkins
authors.forename: William C
authors.initials: WC
authors.lastname: Stewart
mesh_terms: D000577:Amides; D000959:Antihypertensive Agents / Q000008:administration & dosage / Q000009:adverse effects / Q000627:therapeutic use*; D000069580:Bimatoprost; D002940:Circadian Rhythm; D003008:Cloprostenol / Q000031:analogs & derivatives; D018592:Cross-Over Studies; D004311:Double-Blind Method; D005260:Female; D005902:Glaucoma, Open-Angle / Q000188:drug therapy*; D006801:Humans; D007429:Intraocular Pressure / Q000187:drug effects*; D000077338:Latanoprost; D008055:Lipids / Q000008:administration & dosage / Q000009:adverse effects / Q000627:therapeutic use*; D008297:Male; D008875:Middle Aged; D009883:Ophthalmic Solutions; D011446:Prospective Studies; D011461:Prostaglandins F, Synthetic / Q000008:administration & dosage / Q000009:adverse effects / Q000627:therapeutic use*
chemical_list: D000577:Amides; D000959:Antihypertensive Agents; D008055:Lipids; D009883:Ophthalmic Solutions; D011461:Prostaglandins F, Synthetic; D003008:Cloprostenol; D000077338:Latanoprost; D000069580:Bimatoprost