J. Segarra et al., THE TOPICAL APPLICATION OF VERAPAMIL AND NIFEDIPINE LOWERS INTRAOCULAR-PRESSURE IN CONSCIOUS RABBITS, General pharmacology, 24(5), 1993, pp. 1163-1171
1. The time-course of the ocular effects of topical verapamil and nife
dipine as well as the dose-response relationship, were studied in cons
cious, normotensive rabbits. 2. Both drugs caused a dose-dependent fal
l of intraocular pressure, which lasted 4 hr or more. 3. Log dose-resp
onse curves of both drugs show a similar peak response, but the potenc
y of verapamil was greater than that of nifedipine. 4. A fall in the i
ntraocular pressure in the untreated eye was also observed. 5. Verapam
il and nifedipine induced a reduction of the tonographic outflow facil
ity in the treated eye.