Lemon-flavored, effervescent antacid/digestive from Italy is a traditional Italian sodium bicarbonate powder. Galeffi Effervescent lemon-flavored little sticks are added to water to produce a thirst-quenching and refreshing drink. Due to its restorative properties, Galeffi is often taken after meals as a digestive. Place two heaping teaspoons in a glass of cold water, stir, and drink while it fizzes.