ACTIVE INGREDIENT: Contains guaifenesin, an expectorant, which helps loosen mucus and thin bronchial secretions. Compares to the active ingredient in Maximum Strength Mucinex and is just as effective. 12-HOUR CHEST CONGESTION RELIEF: Just one dose of this extended-release bi-layer tablet releases the maximum strength medicine you need immediately and lasts for up to 12 hours. BUY ONE GIVE ONE: Every purchase of BETR Remedies provides a medication for an American in need. FDA AUTHORIZED: All products undergo rigorous testing required by the FDA to be classified and labeled as a drug product. Additionally, all facilities where products are made are FDA approved. All products are safe and effective. HSA/FSA ELIGIBLE: Yes, we encourage our customers to use their HSA/FSA benefits if available. USAGE: Do not crush, chew, or break tablet. Take with a full glass of water (this product can be administered without regard for the timing of meals). Adults and children 12 years of age and over take 1 tablet every 12 hours. Do not exceed 2 tablets in 24 hours. Children under 12 years of age: do not use.