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Opthalmic
Drugs (Phenylephrine (Side effects (Pounding in the ears,…
Opthalmic
Drugs
Phenylephrine
Mechanism of action
After topical application to the conjunctiva, phenylephrine acts directly on α-adrenergic receptors in the eye
Producing contraction of the dilator muscle of the pupil and constriction of the arterioles in the conjunctiva
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Proparicaine
Mechanism of action
After topical application to the eye, local anesthetics penetrate to sensory nerve endings in the corneal tissue
These medications block both the initiation and conduction of nerve impulses by decreasing the neuronal membrane's permeability to sodium ions
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