title: Formulation and in vivo evaluation of ocular insert containing phenylephrine and tropicamide.
abstract: A Gelfoam based ocular device containing 1.7 mg of phenylephrine and 0.6 mg of tropicamide was formulated and evaluated for pupillary dilation in rabbits. The manufacturing procedure is fairly simple and the required excipients are inexpensive. The in vivo results show that the mydriatic response produced by the proposed device is larger and longer lasting than that produced by eyedrops with an equivalent amount of phenylephrine and tropicamide. The results reported in this study, along with those of previous studies, imply that Gelfoam(R) is a versatile drug carrier for either local or systemic drug delivery via the ophthalmic route.
authors.affiliation: Department of Pharmaceutical Sciences, College of Pharmacy, University of Arizona, 1703 E. Mabel St., PO Box 210207, Tucson, AZ 85721-0207, USA.
authors.forename: Y C
authors.initials: YC
authors.lastname: Lee
authors.forename: J
authors.initials: J
authors.lastname: Millard
authors.forename: G J
authors.initials: GJ
authors.lastname: Negvesky
authors.forename: S I
authors.initials: SI
authors.lastname: Butrus
authors.forename: S H
authors.initials: SH
authors.lastname: Yalkowsky
mesh_terms: D000818:Animals; D005781:Gelatin Sponge, Absorbable / Q000008:administration & dosage*; D009184:Mydriatics / Q000008:administration & dosage* / Q000494:pharmacology; D009883:Ophthalmic Solutions; D010656:Phenylephrine / Q000008:administration & dosage* / Q000494:pharmacology; D011680:Pupil / Q000187:drug effects; D011817:Rabbits; D014331:Tropicamide / Q000008:administration & dosage* / Q000494:pharmacology
chemical_list: D009184:Mydriatics; D009883:Ophthalmic Solutions; D010656:Phenylephrine; D014331:Tropicamide