 <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]  Talk with your doctor or pharmacist about how to schedule your medications to prevent this problem. If your acid problems last or get worse after you have used this product for 1 week, or if you think you have a serious medical problem, get medical help right away. If you are using this medication regularly on a daily basis for more than 2 weeks, you may have a medical problem that needs different treatment. Ask your doctor whether this is the right medication for you.The side effects of Mylanta Maximum Strength Oral: Nausea, constipation, diarrhea, or headache may occur. If any of these effects last or get worse, tell your doctor or pharmacist promptly. The magnesium in this product can cause diarrhea. Using an antacid that contains only aluminum along with this product can help control diarrhea. The aluminum in this product can cause constipation. To minimize constipation, drink plenty of fluids and exercise. Diarrhea is more common with this product than constipation. If your doctor has directed you to use this medication, remember that your doctor has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects. Aluminum-containing antacids bind to phosphate, an important body chemical, </s>