Alka-Seltzer XS 20 Tablets | Double Action Pain Relief Alka Seltzer XS is an effervescent tablet for tackling a range of common discomforts. Its double-action formula is for rapid relief from headaches, body aches, hangovers, and indigestion. The tablets dissolve in water, and the active ingredients are absorbed quickly. The "XS" indicates an extra strength formula for powerful relief Product Features Double-Action Formula: Provides relief from pain and soothes an upset stomach. Fast & Effective: The effervescent format allows for quick relief. Multi-Condition Relief: For headaches, body aches, hangovers, and indigestion. Extra Strength: Contains an extra strength formula Ingredients The active substances in one Anadin Extra caplet are: Aspirin (500mg) Sodium Bicarbonate (1,060mg) How to Use Adults and children 16 years and over: Two tablets to be taken with water every 4 hours as required. Do not exceed 8 tablets in 24 hours. Dissolve tablets fully in at least 100ml of water. Do not take for more than 3 days for fever or 5 days for pain without consulting a doctor. Always read the label before use