Active Ingredients: (Mucinex Fast-Max Day Time Severe Congestion & Cough): In Each Caplet: Dextromethorphan HBr (10 mg), Guaifenesin (200 mg), Phenylephrine HCl (5 mg). Mucinex Fast-Max Night Time Cold & Flu: In Each Caplet: Acetaminophen (325 mg), Diphenhydramine HCl (12.5 mg), Phenylephrine HCl (5 mg). (Mucinex Fast-Max Day Time Severe Congestion & Cough): Purpose: Cough Suppressant, Expectorant, Nasal Decongestant. (Mucinex Fast-Max Night Time Cold & Flu): Purpose: Pain Reliever/Fever Reducer, Antihistamine/Cough Suppressant, Nasal Decongestant. Inactive Ingredients: (Mucinex Fast-Max Day Time Severe Congestion & Cough): Croscarmellose Sodium, FD&C Blue 2 Aluminum Lake, FD&C Red 40 Aluminum Lake, Methacrylic Acid-Ethyl Acrylate Copolymer, Mica, Microcrystalline Cellulose, Polyethylene Glycol 3350, Polysorbate 80, Polyvinyl Alcohol, Povidone K29/32, Sodium Bicarbonate, Talc, Titanium Dioxide. (Mucinex Fast-Max Night Time Cold & Flu): Croscarmellose Sodium, Crospovidone, FD&C Blue 1, FD&C Blue 2, Ferric Oxide Yellow, Methacrylic Acid ­Ethyl Acrylate Copolymer (1:1) Type A, Mica, Microcrystalline Cellulose, Polyethylene Glycols, Polyvinyl Alcohol, Povidone K29/32, Sodium Bicarbonate, Talc, Titanium Dioxide.