The name you trust for fast and effective relief. Active Ingredients: Per Tablet: Aspirin 325 mg; Citric Acid 1000 mg; Sodium Bicarbonate (Heat-Treated) 1916 mg; Each Tablet Contains: Sodium 567 mg Inactive Ingredients: None Uses: For the relief of: heartburn, acid indigestion, and sour stomach when accompanied with headache or body aches and pains; upset stomach with headache from over-indulgence in food or drink; headache, body aches and pain alone. Alka-Seltzer in water contains principally the antacid sodium citrate and the analgesic sodium acetylsalicylate.