Overview
DESCRIPTION Chemical name: (2-mercaptoethyl) trimethylammonium iodide O,O-diethyl phosphorothioate Structural formula Echothiophate iodide for ophthalmic solution occurs as a white, crystalline, water-soluble, hygroscopic solid having a slight mercaptan-like odor. When freeze-dried in the presence of potassium acetate, the mixture appears as a white amorphous deposit on the walls of the bottle.
Mechanism of Action
CLINICAL PHARMACOLOGY Echothiophate iodide for ophthalmic solution is a long-acting cholinesterase inhibitor for topical use which enhances the effect of endogenously liberated acetylcholine in iris, ciliary muscle, and other parasympathetically innervated structures of the eye. It thereby causes miosis, increase in facility of outflow of aqueous humor, fall in intraocular pressure (IOP), and potentiation of accommodation. Echothiophate iodide for ophthalmic solution will depress both plasma and erythrocyte cholinesterase levels in most patients after a few weeks of eyedrop therapy.
Indications
- INDICATIONS AND USAGE Reduction of Elevated IOP Echothiophate iodide for ophthalmic solution is indicated for the reduction of elevated IOP. Accommodative Esotropia Concomitant esotropias with a significant accommodative component.
Common Doses
- Refer to label
Dosage
DOSAGE AND ADMINISTRATION
Contraindications
- CONTRAINDICATIONS Active uveal inflammation. Most cases of angle-closure glaucoma without iridectomy, due to the possibility of increasing angle block. Hypersensitivity to the active or inactive ingredients.
Side Effects
- ADVERSE REACTIONS Although the relationship, if any, of retinal detachment to the administration of echothiophate iodide for ophthalmic solution has not been established, retinal detachment has been reported in a few cases during the use of echothiophate iodide for ophthalmic solution in adult patients without a previous history of this disorder. Stinging, burning, lacrimation, lid muscle twitching, conjunctival and ciliary redness, browache, induced myopia with visual blurring may occur. Activation of latent iritis or uveitis may occur.
Interactions
- Drug Interactions Echothiophate iodide for ophthalmic solution potentiates other cholinesterase inhibitors such as succinylcholine or organophosphate and carbamate insecticides. Patients undergoing systemic anticholinesterase treatment should be warned of the possible additive effects of echothiophate iodide for ophthalmic solution.