Features:

• Bottle with 500 bi-layer, gluten-free tablets to relieve congestion
• Each tablet contains 600 milligrams of guaifenesin as active ingredient; helps loosen phlegm and thin bronchial secretions to rid the bronchial passageways of bothersome mucus
• Gluten-free; sugar-free; non-drowsy formula
• Bi-layer tablet releases medicine both immediately and over a 12-hour span
• Manufactured in Fort Worth, Texas

Rating : - Mucinex helps Emphasema
My wife suffers from Emphasema and must take six tablets per day to help keep her lungs clear. Mucinex does this job extreemely well.