Phenylephrine, a common ingredient found in many over-the-counter cold medications, has long been thought to be a reliable decongestant. However, recent studies are questioning its effectiveness ...

We now have compelling convincing evidence that oral phenylephrine is ineffective at relieving symptoms of nasal congestion. I feel that this drug and this oral dose shouldn't, um, should have ...

Phenylephrine is used in popular versions of Sudafed, Dayquil and other medications, but experts have long questioned its effectiveness. Last month the Food and Drug Administration formally ...