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Is it necessary to wait several minutes between applications of different topical ophthalmic solutions? A preliminary study with tropicamide eye drops in healthy dogs.
- Source :
- Veterinary Ophthalmology; Jul2021, Vol. 24 Issue 4, p374-379, 6p
- Publication Year :
- 2021
-
Abstract
- Objective: To evaluate the efficacy of topical tropicamide when placed at different time intervals before or after a saline drop. Animals studied: Eight healthy Labrador and golden retriever dogs. Procedures: The effect of 1% tropicamide on pupillary diameter (PD) was measured over 240 min when administered alone (control) and then 1 and 5 min prior to, or following, application of a saline drop, with 1‐week washout between each of the five trials. Data were analyzed using repeated‐measures ANOVA and Tukey post hoc test. Results: Only 6/110 pairwise comparisons among the 5 trials were statistically significant (p ≤.035), with post‐hoc analysis showing no significant differences (p ≥.14) between the overall means of all trials. In all five trials, maximal PD was reached 30 min after tropicamide application and maintained until 210 min for 180 min (p =.0005). Conclusions: Our results suggest that waiting 1 min between applications of different ophthalmic solutions may be sufficient for maximal drug effect. Care should be taken when extrapolating these results to other species and different ophthalmic formulations. [ABSTRACT FROM AUTHOR]
- Subjects :
- EYE drops
OPHTHALMIC drugs
GOLDEN retriever
LABRADOR retriever
PHARMACODYNAMICS
Subjects
Details
- Language :
- English
- ISSN :
- 14635216
- Volume :
- 24
- Issue :
- 4
- Database :
- Complementary Index
- Journal :
- Veterinary Ophthalmology
- Publication Type :
- Academic Journal
- Accession number :
- 153156652
- Full Text :
- https://doi.org/10.1111/vop.12905