 <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]  second- or third-degree atrioventricular block), low blood flow to the brain (cerebrovascular insufficiency), poor blood flow to the hands/feet (Raynaud's phenomenon), severe allergies. If you develop an eye infection or injury, or have eye surgery, check with your doctor about whether you should continue to use your current bottle of betaxolol. You may be advised to start using a new bottle. Before having surgery, tell your doctor or dentist about all the products you use (including prescription drugs, nonprescription drugs, and herbal products). This drug may make you dizzy or temporarily blur your vision. Do not drive, use machinery, or do anything that needs alertness or clear vision until you can do it safely. Limit alcoholic beverages. Talk to your doctor if you are using marijuana (cannabis). This product may prevent the fast/pounding heartbeat you would usually feel when your blood sugar level falls too low (hypoglycemia). The risk is higher if you have diabetes, or are vomiting, fasting, or not eating regularly. Other symptoms of low blood sugar level, such as dizziness and sweating, are not affected by this drug. If you have diabetes, this product may make it </s>