Fast Powder Packs and the effervescent formulas?
Alka-Seltzer Plus® Fast Powder Packs are tasteless and odorless, and the powder form allows them to be dissolved in several different types of beverages. The pain reliever in Alka-Seltzer Plus® Fast Powder Packs is acetaminophen, while the pain reliever in our current Alka-Seltzer Plus® effervescent formulas is aspirin.