Chapter 18 - Ophthalmic and Otic Drugs Flashcards
Most ophthalmic topical drugs are _____ and _______ soluble
lipid and water
These type of topical drugs can blur their vision, longer shelf life, longer corneal contact times
Do not use in pts with penetrating corneal wounds
Ointments
Easier to administer than ointments
Better drug levels within the system
Drops
Should be given before ointments
drops
These type of diagnostic drugs are used to facilitate the eye exam such as measuring eye pressure, eye exams, and remove foreign bodies
-caines group
Topical anesthetics
Onset of action of topical anesthetics, and the duration
1 min onset
10 min duration
When opening a topical anesthetic, the left over should be
refrigerated
Topical anesthetics should be thrown out when there is a significant
color change
Diagnostic drug used to ID corneal ulcers, scratches, and foreign bodies or to test the patency of the nasolacrimal duct
Flourescein sodium
After administering fluorescein sodium, you should flush the eye with _________ to avoid false positives
saline
Flourescein sodium should change from orange to ______ when a corneal abrasion is seen
green
These are cholinergic drugs that constrict the pupil
Most commonly used in glaucoma patients to promote aqueous humor movement
Can cause local irritation
Ex: Pilocarpine
Miotics
Onset of action of miotics
10-30 minutes
Duration of miotics
4-8 hrs
Drugs that dilate the pupils
Mydriatics
Drugs that paralyze the ciliary muscles
Cycloplegics
Most widely used mydriatic agent because it is also a cycloplegic
Aids in the examination of the retina and treatment of acute inflammatory conditions of the anterior uveal tract
Atropine
Atropine is contraindicated in these 2 types of patients
- KCS
2. glaucoma
2 side effects of atropine
- dry eye
2. increased intraocular pressure
This mydriatic agent has a faster onset of action and shorter duration than atropine
Homatropine
A mydriatic agent only that acts as a sympathomimetic used to evaluate uveitis, glaucoma, scleritis, and Horner’s Syndrome
Used prior to conjuctival surgery to decrease hemorrhage
Phenylephrine
Phenylephrine is not recommended in this species because it doesn’t work alone
cats
S/e of this drug include: tearing, corneal clouding, and discomfort
phenylephrine
A mydriatic that is an acetylcholine blocker
Used for ocular examinations
Can cause hypersalivation in cats
Doesn’t affect intraocular pressure
Ex: Opticyl, Mydriacyle
Tropicamide