 <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]  You may report side effects to FDA at 1-800-FDA-1088 or at www.fda.gov/medwatch. In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.The precautions of Betaxolol Ophthalmic (Eye): Before using betaxolol, tell your doctor or pharmacist if you are allergic to it; or to other beta blockers (such as timolol, metipranolol); or if you have any other allergies. This product may contain inactive ingredients (such as preservatives like benzalkonium chloride), which can cause allergic reactions or other problems. Talk to your pharmacist for more details. Before using this medication, tell your doctor or pharmacist your medical history, especially of: diabetes, low blood sugar levels (hypoglycemia), overactive thyroid (hyperthyroidism), muscle weakness disorders (such as myasthenia gravis), breathing problems (such as asthma, chronic obstructive pulmonary disease-COPD), heart problems (such as heart failure, slow heartbeat, second- or third-degree atrioventricular block), low blood flow to the brain ( </s>