Is there baking soda in Alka-Seltzer?

Yes, baking soda is one of the active ingredients in Alka-Seltzer.

Alka-Seltzer is an effervescent antacid and pain reliever that is used to treat heartburn, indigestion, and headaches. It contains a combination of aspirin, sodium bicarbonate (baking soda), and citric acid. When Alka-Seltzer is dissolved in water, the sodium bicarbonate reacts with the citric acid to produce carbon dioxide gas. This gas causes the tablet to fizz and release the aspirin and sodium bicarbonate into the water.

The aspirin in Alka-Seltzer is a pain reliever that helps to reduce headaches, muscle aches, and other types of pain. The sodium bicarbonate in Alka-Seltzer helps to neutralize stomach acid and relieve heartburn and indigestion.