 <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]  It is best to avoid taking this medication within 4 hours of your bedtime to avoid having to get up to urinate. Consult your doctor or pharmacist if you have questions about your dosing schedule. If you are also taking cholestyramine or colestipol, take bisoprolol/hydrochlorothiazide at least 4 hours before or at least 4 to 6 hours after either of those drugs. Use this medication regularly in order to get the most benefit from it. To help you remember, take it at the same time each day. Keep taking this medication even if you feel well. Most people with high blood pressure do not feel sick. It may take up to 3 weeks before you get the full benefit of this drug. Inform your doctor if your condition worsens (such as your routine blood pressure readings increase).The side effects of Ziac Oral: See also Precautions section. Dizziness, lightheadedness, tiredness, and drowsiness may occur as your body adjusts to the medication. Nausea, stomach upset, diarrhea, cough, constipation and trouble sleeping may also occur. If any of these effects last or get worse, notify your doctor or pharmacist promptly. To lower your risk of dizziness </s>