Phenylephrine is a medication that’s been used to relieve nasal congestion caused by colds, allergies, and hay fever, per the U.S. National Library of Medicine.

The Food and Drug Administration (FDA) is considering removing oral phenylephrine, a common ingredient in many over-the-counter cold and flu medications.

Many popular cold and flu remedies may be pulled from US shelves after, the Food and Drug Administration (FDA) deemed oral phenylephrine ineffective as a nasal decongestant. Phenylephrine is the main decongestant ingredient in over-the-counter cold and flu medicines such as Advil,