Abstract | PURPOSE: METHODS: After a 1-month washout period a baseline diurnal curve was measured every 2 hours from 08:00 hours (trough) to 20:00 hours in subjects with a trough intraocular pressure (IOP) and the pressure 24 mmHg. Qualified subjects were randomized to either brimonidine or unoprostone. After 6 weeks of treatment the period 1 diurnal curve was performed. Subjects were then switched to the opposite treatment for 6 weeks and the period 2 diurnal curve was performed. RESULTS: A total of 33 subjects were included in this study. In the brimonidine-treated group the trough IOP 20.1 +/- 2.8 mmHg was reduced from baseline up to 8 hours after dosing. In the unoprostone-treated group the trough IOP was 19.5 +/- 3.0 mmHg, which was statistically equal to that of brimonidine (p = 0.21), was reduced from baseline for 12 hours after dosing. Brimonidine decreased the IOP statistically more than unoprostone at 10:00 and 12:00 hours (p < 0.0001 and p = 0.02, respectively), while unoprostone reduced the IOP more than brimonidine at 18:00 and 20:00 hours (p = 0.002 and p = 0.05, respectively). Safety levels were similar between groups, but unoprostone caused more ocular stinging than brimonidine (p = 0.008). CONCLUSION: This study suggests that twice daily brimonidine demonstrates a statistically greater peak reduction in IOP than unoprostone. However, unoprostone, but not brimonidine, decreased IOP over the complete 12-hour daytime dosing cycle.
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Authors | William C Stewart, Jeanette A Stewart, Douglas G Day, Jessica Jenkins |
Journal | Acta ophthalmologica Scandinavica
(Acta Ophthalmol Scand)
Vol. 82
Issue 2
Pg. 161-5
(Apr 2004)
ISSN: 1395-3907 [Print] Denmark |
PMID | 15043534
(Publication Type: Clinical Trial, Comparative Study, Journal Article, Randomized Controlled Trial, Research Support, Non-U.S. Gov't)
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Chemical References |
- Antihypertensive Agents
- Ophthalmic Solutions
- Quinoxalines
- Brimonidine Tartrate
- isopropyl unoprostone
- Dinoprost
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Topics |
- Antihypertensive Agents
(administration & dosage, adverse effects)
- Brimonidine Tartrate
- Circadian Rhythm
(drug effects)
- Cross-Over Studies
- Dinoprost
(administration & dosage, adverse effects, analogs & derivatives)
- Female
- Glaucoma, Open-Angle
(drug therapy)
- Humans
- Intraocular Pressure
(drug effects)
- Male
- Middle Aged
- Ocular Hypertension
(drug therapy)
- Ophthalmic Solutions
- Quinoxalines
(administration & dosage, adverse effects)
- Safety
- Treatment Outcome
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