That's where over-the-counter (OTC) cold medications like Dayquil, Mucinex, Sudafed, and more can come in super handy. But ...

Despite needing FDA clearance to be on the shelves of your local pharmacy, some popular medicines probably don't work.

That's where over-the-counter (OTC) cold medications like Dayquil, Mucinex, Sudafed ... which includes both phenylephrine and pseudoephedrine—come in. “Nasal decongestants target these ...