Get fast relief of heartburn, upset stomach, and acid indigestion with headache or body aches. Alka-Seltzer has been around for more than 80 years. Unlike Tums or Mylanta, H-2 blockers such as Pepcid, and PPIs like Prilosec and Nexium, Alka-Seltzer® Original contains an analgesic for pain accompanied by heartburn and acid indigestion. Neutralizes acid fast on contact! Our flagship product, effervescent tablets dissolve in water to bring you fast, fizzy relief. Hear it, see it, and feel it working. Fast relief of heartburn, upset stomach, and acid indigestion with headache or body aches Alka-Seltzer has provided trusted, effective, effervescent relief for more than 80 years Contains an analgesic for pain accompanied by heartburn and acid indigestion