• The FDA has proposed pulling removing a widely used nasal decongestant ingredient from OTC medications.
• Phenylephrine, used in popular meds like DayQuil, Theraflu and Sudafed, has shown to be completely ineffective in treating congestion when taken orally.
• The FDA will make its final decision to pull ban the ingredient, also used in Benadryl, Alka-Seltzer Plus and Tylenol, by May 7th.  Until then, drugmakers can still market oral phenylephrine as an oral decongestant.
• Phenylephrine became a popular cold and allergy medicine ingredient in the early 2000s after a law banned over the counter sales of pseudoephedrine, which is used to make meth.

https://www.health.com/fda-ban-phenylephrine-cold-medicine-8741749