title: Ocular surface tolerability of prostaglandin analogs in patients with glaucoma or ocular hypertension.
abstract: OBJECTIVE
  To compare the ocular surface tolerability of latanoprost 0.005% preserved with 0.02% benzalkonium chloride (BAK), bimatoprost 0.03% preserved with 0.005% BAK, and travoprost 0.004% preserved with the proprietary preservative system sofZia in patients previously treated with latanoprost.
  
  
  METHODS
  This randomized, multicenter, investigator-masked, parallel-group study enrolled patients with open-angle glaucoma or ocular hypertension who had been on latanoprost monotherapy for at least 4 weeks. At baseline, patients were randomized to receive once-daily bimatoprost (n=35), latanoprost (n=38), or travoprost (n=33) monotherapy for 3 months. Follow-up visits were at week 1, month 1, and month 3. The primary outcome measure was physician-graded conjunctival hyperemia at month 3. Secondary outcome measures included corneal staining with fluorescein and tear breakup time (TBUT).
  
  
  RESULTS
  There were no significant differences among the treatment groups in conjunctival hyperemia scores, corneal staining, or TBUT at the latanoprost-treated baseline or at any follow-up visit. Baseline mean (standard error of the mean) values were as follows--conjunctival hyperemia: bimatoprost 0.74 (0.10), latanoprost 0.74 (0.11), travoprost 0.86 (0.12), P=0.692; corneal staining: bimatoprost 0.59 (0.12), latanoprost 0.70 (0.13), travoprost 0.48 (0.11), P=0.423; TBUT (in seconds): bimatoprost 9.1 (1.0), latanoprost 8.6 (0.8), travoprost 7.9 (0.8), P=0.578. Month 3 values were as follows--conjunctival hyperemia: bimatoprost 0.80 (0.12), latanoprost 0.74 (0.10), travoprost 0.98 (0.13), P=0.340; corneal staining: bimatoprost 0.71 (0.78), latanoprost 0.47 (0.64), travoprost 0.36 (0.62), P=0.110; TBUT (in seconds): bimatoprost 9.7 (5.3), latanoprost 9.2 (5.3), travoprost 9.7 (6.3), P=0.909.
  
  
  CONCLUSIONS
  There were no significant differences among bimatoprost (preserved with 0.005% BAK), latanoprost (preserved with 0.02% BAK), and travoprost (preserved with sofZia) in objective clinical measures of ocular tolerability, including physician-graded hyperemia, corneal staining, and TBUT after 3 months of treatment. Longer-term studies are needed to further evaluate the ocular surface tolerability of these prostaglandin analogs.
authors.affiliation: UT Southwestern Medical Center, Dallas, Texas 75390-8866, USA. jess.whitson@utsouthwestern.edu
authors.forename: Jess T
authors.initials: JT
authors.lastname: Whitson
authors.forename: William B
authors.initials: WB
authors.lastname: Trattler
authors.forename: Cynthia
authors.initials: C
authors.lastname: Matossian
authors.forename: Julia
authors.initials: J
authors.lastname: Williams
authors.forename: David A
authors.initials: DA
authors.lastname: Hollander
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000577:Amides / Q000009:adverse effects* / Q000627:therapeutic use; D000959:Antihypertensive Agents / Q000009:adverse effects* / Q000627:therapeutic use; D001548:Benzalkonium Compounds / Q000737:chemistry; D000069580:Bimatoprost; D003008:Cloprostenol / Q000009:adverse effects / Q000031:analogs & derivatives* / Q000627:therapeutic use; D003228:Conjunctiva / Q000187:drug effects / Q000473:pathology; D003315:Cornea / Q000187:drug effects / Q000473:pathology; D005260:Female; D005500:Follow-Up Studies; D005902:Glaucoma, Open-Angle / Q000188:drug therapy; D006801:Humans; D006940:Hyperemia / Q000139:chemically induced; D000077338:Latanoprost; D008297:Male; D008875:Middle Aged; D009798:Ocular Hypertension / Q000188:drug therapy; D011310:Preservatives, Pharmaceutical / Q000737:chemistry; D011461:Prostaglandins F, Synthetic / Q000009:adverse effects* / Q000627:therapeutic use; D016037:Single-Blind Method; D013666:Tears / Q000378:metabolism; D000069557:Travoprost; D016896:Treatment Outcome
chemical_list: D000577:Amides; D000959:Antihypertensive Agents; D001548:Benzalkonium Compounds; D011310:Preservatives, Pharmaceutical; D011461:Prostaglandins F, Synthetic; D003008:Cloprostenol; D000077338:Latanoprost; D000069580:Bimatoprost; D000069557:Travoprost