 <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]  pharmacist for more details. The dosage is based on your medical condition and response to treatment. Your doctor may gradually increase your dose. Follow your doctor's instructions carefully. Use this medication regularly 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. Tell your doctor if your condition does not improve or if it worsens (for example, your routine blood pressure readings remain high or increase).The side effects of Nisoldipine Oral: Dizziness, swelling ankles/feet, flushing, or headache may occur. If any of these effects last or get worse, tell your doctor or pharmacist promptly. To reduce dizziness and lightheadedness, get up slowly when rising from a sitting or lying position. An empty tablet shell may appear in your stool. This effect is harmless because your body has already absorbed the medication. Remember that this medication has been prescribed because your doctor has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects. Tell your doctor right away if you have any serious side effects, including: fast/ir </s>