Phenylephrine ophthalmic causes constriction of blood vessels in the eyes. It also enlarges the
pupils, reduces the production of fluid in the eyes, and increases the amount of fluid that drains from
the eyes.
Phenylephrine ophthalmic available over-the-counter is used to relieve redness, burning,
irritation, and dryness of the eye caused by wind, sun, and other minor irritants. Prescription-strength
phenylephrine ophthalmic is used to constrict blood vessels in the eye and to dilate (make bigger) the
pupil for conditions such as glaucoma, before surgery, and before eye examinations.
Phenylephrine ophthalmic may also be used for purposes other than those listed in this
medication guide.