From the manufacturer's website:
When you get heartburn, acid indigestion or sour stomach with pain, turn to Alka-Seltzer Extra Strength for fast relief. Alka-Seltzer Extra Strength gently breaks up and dissolves away your heartburn symptoms and pain fast so you can get back to what's important to you. It’s the most powerful Alka-Seltzer you can get. It’s also great for pain alone.
Warning: See attached picture.
*These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure or prevent any disease.