Alka Seltzer Effervescent Tablet is used for Fever, Pain, Rheumatic fever, Rheumatoid arthritis, Pericarditis, Kawasaki disease, Heart attack, Risk of stroke, Treatment of urinary bladder calculi, Anticoagulation and other conditions. Alka Seltzer Effervescent Tablet may also be used for purposes not listed in this medication guide. Alka Seltzer Effervescent Tablet contains Acetylsalicylic Acid, Citric Acid and Sodium Hydrogen Carbonate as active ingredients. Alka Seltzer Effervescent Tablet works by suppressing the production of prostaglandins; possessing the calcium chelating ability; lowering the coagulation factor activity; exhibiting the antioxidant action; raising the plasma bicarbonate levels;