Why should I take an effervescent instead of a regular tablet?There are multiple advantages to using Alka-Seltzer Gold Effervescent Tablets. In short: the medicine dissolves fast and goes to work instantly, neutralizing acid on contact. Because the medicines in Alka-Seltzer effervescents are in solution prior to ingestion, they do not require time to dissolve in the stomach like similar active ingredients taken in a tablet form. | What are the active ingredients in Alka-Seltzer Gold Effervescent Tablets?Alka-Seltzer Gold Effervescent Tablets contain anhydrous citric acid (antacid), sodium bicarbonate (antacid) and potassium bicarbonate (antacid). | What temperature water should I use and what makes it fizz? The best temperature is room temperature. Cold water will slow down dissolution and warm water can make it foam excessively. Alka-Seltzer contains citric acid and sodium bicarbonate (baking soda). When you drop the tablet in water, the acid and the baking soda react – this produces the fizz. | Does it contain PPA (phenylpropanolamine)?No, none of the current Alka-Seltzer formulas contain PPA (phenylpropanolamine). |