title: Sustained effect of travoprost on diurnal and nocturnal intraocular pressure.
abstract: OBJECTIVE
  To assess the diurnal and nocturnal persistency of intraocular pressure (IOP) reduction after omission of up to two doses of once-daily topical travoprost in patients with open-angle glaucoma or ocular hypertension.
  
  
  METHODS
  Prospective, open-label study.
  
  
  METHODS
  Twenty subjects underwent three sessions of 24-hour IOP monitoring. The first session occurred before initiating treatment of newly diagnosed patients or after a four-week washout in patients already receiving medical therapy. The second session occurred after four weeks or more of travoprost treatment. The third session was performed 41 to 63 hours after the last travoprost dose.
  
  
  RESULTS
  IOP lowering persisted after omission of one to two doses. Between 41 to 63 hours after the last dose, diurnal IOP reduction was attenuated, but nocturnal IOP reduction sustained.
  
  
  CONCLUSIONS
  IOP lowering effect after omission of one to two doses of travoprost is attenuated in the diurnal period but sustained in the nocturnal period, the time corresponding to the highest baseline habitual IOP.
authors.affiliation: Hamilton Glaucoma Center and Department of Ophthalmology, University of California, San Diego, La Jolla, 92093, USA.
authors.forename: Arthur J
authors.initials: AJ
authors.lastname: Sit
authors.forename: Robert N
authors.initials: RN
authors.lastname: Weinreb
authors.forename: Jonathan G
authors.initials: JG
authors.lastname: Crowston
authors.forename: Daniel F
authors.initials: DF
authors.lastname: Kripke
authors.forename: John H K
authors.initials: JH
authors.lastname: Liu
mesh_terms: D000368:Aged; D000959:Antihypertensive Agents / Q000008:administration & dosage*; D002940:Circadian Rhythm / Q000187:drug effects*; D003008:Cloprostenol / Q000008:administration & dosage / Q000031:analogs & derivatives*; D005260:Female; D005902:Glaucoma, Open-Angle / Q000188:drug therapy*; D006801:Humans; D007429:Intraocular Pressure / Q000187:drug effects*; D008297:Male; D008875:Middle Aged; D009798:Ocular Hypertension / Q000188:drug therapy; D011446:Prospective Studies; D000069557:Travoprost
chemical_list: D000959:Antihypertensive Agents; D003008:Cloprostenol; D000069557:Travoprost