Alka Seltzer Effervescent Tablets provide fast and effective relief of general pain such as migraine, period pains, rheumatic and muscular pain, toothache, sore throat, nerve pain and the symptomatic relief of colds and flu. They contain acetylsalicylic acid (aspirin) 324mg, sodium hydrogen carbonate 1744mg, and citric acid 965mg. Suitable for women's and men's use.