Oral phenylephrine is used in over-the-counter products like Sudafed and Dayquil to help temporarily relieve the common symptom of colds and allergies. Phenylephrine has been sold for more than 75 ...
ExploreFDA says key ingredient in Sudafed, Vicks and Benadryl products doesn’t work “It is the ... of safe and effective drugs and other treatments is available to temporarily relieve congestion ...