Alka-Seltzer XS Effervescent Tablets provide relief for mild to moderate pain, including headaches, migraines, backaches, nerve pain, period pain, toothache, and sore throats. They can also be used for the symptomatic relief of colds and influenza, as well as rheumatic pain, muscle tenderness and stiffness, and muscular aches and pains. Each tablet contains aspirin (267mg), paracetamol (133mg), and caffeine (40mg). Adults and children over 16 can take two tablets dissolved in water every 4 hours as needed, not exceeding 8 tablets in 24 hours. Not recommended for children under 16. Do not take for more than 3 days consecutively without consulting a doctor. Avoid use if allergic to aspirin, paracetamol, caffeine, other pain relievers, or if you have bleeding disorders, stomach ulcers, or are taking high doses of methotrexate. Consult a doctor before use if pregnant or breastfeeding.