 <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]  medication by mouth as directed by your doctor, usually 2 to 4 times daily. Take this medication before meals (and at bedtime if taking 4 times daily). Measure the liquid medication with a medication-measuring spoon or device. Do not use a household spoon because you may not get the correct dose. The dosage is based on your medical condition and response to treatment. Use this medication regularly to get the most benefit from it. To help you remember, take it at the same times each day. Keep taking this medication even if you feel well. This medication is used to help prevent chest pain or migraines. It should not be used to treat chest pain or migraines when they occur. Use other medications (such as nitroglycerin tablets placed under the tongue for chest pain, sumatriptan for migraines) to relieve sudden attacks as directed by your doctor. Consult your doctor or pharmacist for details. If you also take certain drugs to lower your cholesterol (bile acid-binding resins such as cholestyramine or colestipol), take propranolol at least 1 hour before or at least 4 hours after these medications. For the treatment of high blood pressure, it may take 1 to 2 weeks before you get </s>