Phenylephrine is an alpha-1 adrenergic receptor agonist used to treat hypotension, dilate the pupil, and induce local vasoconstriction. The action of phenylephrine, or neo-synephrine, was first described in literature in the 1930s.
Phenylephrine was granted FDA approval in 1939.
Phenylephrine is available in various drug formulations, which have different indications. Phenylephrine injections are indicated to treat hypotension caused by shock or anesthesia. The ophthalmic formulation is indicated to induce mydriasis and conjunctival vasoconstriction. The intranasal formulation is used to treat congestion, and a topical formulation is used to treat hemorrhoids. Off-label uses include priapism and induction of local vasoconstriction.
University of California San Francisco, San Francisco, California, United States
KK Women's and Children's Hospital, Singapore, Singapore
The Affiliated Hospital of Xuzhou Medical University, Xuzhou, Jiangsu, China
Cairo University, Cairo, Egypt
Cairo University, Cairo, Egypt
Çukurova University Balcalı Hospital, Adana, Turkey
Wake Forest Baptist Health Eye Center, Winston-Salem, North Carolina, United States
Addenbrooke's Hospital, Cambridge, Cambridgeshire, United Kingdom
Assiut university hospital, Assiut, Egypt
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