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

Acetaminophen, one of the active ingredients in DayQuil ... at temperatures above 77 degrees but not frozen. Like all ...

For some women, using Mucinex, the cough medicine, to address and clear up mucus or flem, as Guaifenesin is an active ingredient (that alleviates congestion by thinning phlegm, a type of mucus ...

If you have a bottle of Mucinex in your medicine cabinet ... are correctly labeled on the front of the bottles and list all active ingredients, they may have an incorrect corresponding drug ...