Get tasty, fast, refreshing relief of heartburn, upset stomach, and acid indigestion with headache or body aches. It has a great flavor and gets you feeling better. Neutralizes acid fast on contact! Get tasty, fast, refreshing relief of heartburn, upset stomach, acid indigestion, headache and body aches Our flagship form effervescent tablets dissolve in water to bring you fast, fizzy relief. Hear it, see it, and feel it working. Alka-Seltzer has provided trusted, effective, effervescent relief for more than 80 years Contains an analgesic for pain accompanied by heartburn and acid indigestion