Expect relief with an expectorant that works to thin and loosen mucus. Relieves chest congestion, so you can feel better. Provides 12 hour relief. Contains: Guaifenesin; Description: Mucinex® Expectorant Regular Strength, 100 Single Wrapped Tablets/Box.Package Includes: Includes 12 boxes of 100 tablets eachNote: This is a non-returnable item.