 <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 your stomach makes. It relieves symptoms such as cough that doesn't go away, stomach pain, heartburn, and difficulty swallowing. Famotidine belongs to a class of drugs known as H2 blockers.This medication is also available without a prescription. It is used to prevent and treat heartburn and other symptoms caused by too much acid in the stomach (acid indigestion). If you are taking this medication for self-treatment, it is important to read the manufacturer's package instructions carefully so you know when to consult your doctor or pharmacist. How to use Zantac 360 Maximum Strength Take this medication by mouth with or without food as directed by your doctor, usually once or twice daily. If you are taking this medication once daily, it is usually taken right before bedtime. The dosage and length of treatment are based on your medical condition and response to therapy. In children, dosage may also be based on body weight. You may take other medications (such as antacids) for your condition as recommended by your doctor. Follow your doctor's instructions carefully. Consult your doctor or pharmacist if you have any questions. Take this medication regularly in order to get the most benefit from it. To help you remember, take it at the same time( </s>