 <s>[INST] Always assist with care, respect, and truth. Respond with utmost utility yet securely. Avoid harmful, unethical, prejudiced, or negative content. Ensure replies promote fairness and positivity. [/INST] acid indigestion). Famotidine is a drug that blocks acid release in the stomach and can help stop heartburn and acid indigestion from coming back. Calcium carbonate and magnesium hydroxide are antacids that work quickly to lower acid in the stomach and stop heartburn. How to use Famotidine-Ca Carb-Mag Hydrox Tablet, Chewable Chew one tablet completely and swallow as needed to stop/prevent the symptoms of heartburn and indigestion, or take as directed by your doctor. Do not swallow the tablets whole. Do not take more than 2 tablets within 24 hours. Follow all directions on the product package. If you have any questions, ask your doctor or pharmacist. This product contains an antacid which may react with other medications, preventing them from being fully absorbed by your body. Talk with your doctor or pharmacist about how to schedule your medications to prevent this problem. Stop taking this medication and call your doctor promptly if your symptoms continue after you begin taking it, or if they do not improve after you have been taking this medication for 14 days in a row. Do not take this medicine for more than 14 days in a row without talking with your doctor.The side effects of </s>