Cyclomydril (Cyclopentolate Hydrochloride / Phenylephrine Hydrochloride Ophthalmic) - Description and Clinical Pharmacology

DESCRIPTION

CYCLOMYDRIL® (cyclopentolate hydrochloride and phenylephrine hydrochloride ophthalmic solution) is a mydriatic prepared as a sterile topical ophthalmic solution. The active ingredients are represented by the chemical structures:

Each mL contains: Active: cyclopentolate hydrochloride 0.2%, phenylephrine hydrochloride 1%. Preservative: benzalkonium chloride 0.01%. Inactives: edetate disodium, boric acid, hydrochloric acid and /or sodium carbonate (to adjust pH), purified water.

CLINICAL PHARMACOLOGY

Cyclopentolate hydrochloride is an anticholinergic drug and Phenylephrine hydrochloride is an adrenergic drug. This combination induces mydriasis that is greater than that of either drug alone at its respective concentration. The concentrations of cyclopentolate hydrochloride and phenylephrine hydrochloride have been selected to induce mydriasis with little accompanying cycloplegia. Heavily pigmented irides may require more doses than lightly pigmented irides.