Alka- Seltzer Original 20 Tablets (also available in packs of 10 tablets) - Relieve the discomfort and pain of a headache and upset stomach with Alka-Seltzer Original and get fast, effective relief when you need it most. Alka-Seltzer Original has been used and trusted from over 70 years across the globe to give relief when you\'ve over indulged, get fast effective relief with Alka-Seltzer Original Tablets to break up the pain and cool and neutralise your stomach acid.