Phenylephrine is a medication that belongs to the class of nasal decongestants. It is used for the temporary relief of nasal discomfort caused by colds, allergies, and hay fever. Phenylephrine works by reducing swelling of the blood vessels in the nasal passages, which helps relieve symptoms of a stuffy or runny nose, sinus congestion, and ear symptoms caused by the common cold, flu, allergies, or other breathing illnesses
. It is available in various forms such as tablets, liquid, or dissolving strips, and should be taken as directed by a doctor or pharmacist. Phenylephrine should not be taken by individuals who are allergic to it or who are taking a monoamine oxidase (MAO) inhibitor
