Disposal: All liquids and solutions can be poured down the drain with running water. Solid waste can be disposed of in the trash. Alka-Seltzer is a common antacid used to relieve an upset stomach.
Even some antacids - such as Alka-Seltzer -- contain aspirin ... all the medicines you take before you're prescribed a new medicine. Don't forget to mention over-the-counter medicines, herbal ...