Peer-reviewed veterinary case report
How travoprost eye drops affect eye pressure and pupil size in dogs
By Gelatt, Kirk N & MacKay, Edward O·Published in Veterinary ophthalmology·2004·Department of Small Animal Clinical Sciences and Gwathmey-Adams Laboratory for Vision Science, United States·View original on PubMed →
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Original publication title: Effect of different dose schedules of travoprost on intraocular pressure and pupil size in the glaucomatous Beagle.
- Species:
- dog
Plain-English summary
A group of Beagle dogs with glaucoma (a condition that increases pressure in the eye) were treated with a medication called travoprost to see how it affected their eye pressure and pupil size. The dogs received the medication either once in the morning, once in the evening, or twice a day over several days. Results showed that all dosing schedules significantly lowered eye pressure compared to a control group, with the twice-daily treatment being the most effective. The dogs also experienced temporary constriction of their pupils.
People also search for: Beagle glaucoma treatment · travoprost for dogs · dog eye pressure medication
Abstract
OBJECTIVE: To evaluate changes in intraocular pressure and pupil size in glaucomatous dogs after instillation of 0.004% travoprost once in the morning, or once in the evening, or twice daily in 5-day multiple dose studies. MATERIALS AND METHODS: Applanation tonometry (IOP) and pupil size (PS) measurements were obtained at 8 a.m., 10 a.m., 12 noon, 2 p.m. and 4 p.m. in eight glaucoma dogs. Methylcellulose (0.5% as placebo) was instilled in the control eye, and 0.004% travoprost was instilled in the opposite drug eye. Methylcellulose (0.5%) and 0.004% travoprost were instilled on the 2nd through to the 5th day with instillations in the morning (8.30 a.m.), or evening (8 p.m.), or twice daily (8.30 a.m. and 8 p.m.). RESULTS: The mean +/- SEM diurnal changes from baseline IOP in the control and placebo eyes in all three studies ranged from 1.2 +/- 0.3 mmHg to 3.2 +/- 0.9 mmHg. The mean +/- SEM diurnal changes from the baseline IOP after 0.004% travoprost at 8 a.m. once daily for the next 4 days were 19.0 +/- 2.7 mmHg, 24.7 +/- 2.7 mmHg, 24.9 +/- 3.1 mmHg, and 24.7 +/- 3.1 mmHg, respectively, and were significantly different from the control eye. After travoprost was instilled at 8 p.m., the mean +/- SEM baseline changes from the baseline IOP in the drug eyes were 23.5 +/- 2.2 mmHg, 24.2 +/- 2.2 mmHg, 24.5 +/- 2.3 mmHg, and 24.2 +/- 2.3 mmHg, respectively. When 0.004% travoprost was instilled twice daily, the mean +/- SEM baseline IOP changes were 27.7 +/- 2.1 mmHg, 28.1 +/- 2.1 mmHg, 28.4 +/- 2.2 mmHg, and 28.5 +/- 2.2 mmHg, respectively, and were significantly different from the control eyes. Miosis of varying duration was frequent during the three studies. CONCLUSION: Travoprost instilled once daily (a.m. or p.m.) as well as twice daily produces significant decreases in IOP and PS in the glaucomatous Beagle.
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Search related cases →Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/14738508/