Skip to main content
An official website of the United States government
Government Funding Lapse
Because of a lapse in government funding, the information on this website may not be up to date, transactions submitted via the website may not be processed, and the agency may not be able to respond to inquiries until appropriations are enacted.

The NIH Clinical Center (the research hospital of NIH) is open. For more details about its operating status, please visit cc.nih.gov.

Updates regarding government operating status and resumption of normal operations can be found at opm.gov.

topical phenylephrine solution

A topical solution containing phenylephrine, a sympathomimetic amine with vasoconstricting activity. Upon topical application to the oral mucosa, phenylephrine may activate alpha-adrenergic receptors in the mucosa thereby causing vasoconstriction. As a result, this agent may reduce swelling of the mucosal membranes and decrease radiotherapy-induced mucositis.
Search NCI's Drug Dictionary