Alka-Seltzer is a popular antacid and pain relief medication that is used to treat heartburn, acid indigestion, and headache. However, there are other brands and products in the market that offer similar relief from these symptoms. Some of the synonyms for Alka-Seltzer include Tums, Maalox, Pepto-Bismol, Eno, and Rolaids. These are also antacids and pain relievers that work by neutralizing excess acid in the stomach and calming the nerves that cause headaches. Each product has its unique features and ingredients, and users may prefer one over the other depending on their specific needs. It is advisable to consult a doctor or pharmacist before taking any medication.