People ask all the time, "What is effervescence?" They've heard that term associated with Alka-Seltzer for years and years. Is it the bubbles? What makes the bubbles? And why do those effervescent bubbles work?

Yes, it's the bubbles! They're the result of a series of chemical interactions that speed medicine and relief fast. To learn more about those chemical reactions, visit our science experiment pages.

In the meantime, know that there are benefits to taking Alka-Seltzer® and Alka-Seltzer Plus® effervescent products. Effervescence refers to the unique and lively bubbling form that creates "The Alka-Seltzer® Experience." After dropping the tablet into water, you can rest assured that relief is on the way. Simply put, the medicine dissolves fast and is ready to work the instant you take it. The time it would take for the body to dissolve a solid form pain reliever is eliminated.

Its effervescence is what makes Alka-Seltzer® special. In the words of one of our consumers: "I think Alka-Seltzer is a different kind of medicine because you can see, hear and feel it working. With the active and lively bubbles, Alka-Seltzer® speeds relief."