 <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]  If used for angina, this medication must be taken regularly to be effective. It should not be used to treat angina when it occurs. Use other medications (such as sublingual nitroglycerin) to relieve an angina attack as directed by your doctor. Consult your doctor or pharmacist for details. Tell your doctor if your condition does not improve or if it worsens (for example, your blood pressure readings remain high or increase, chest pain continues or worsens).The side effects of Norvasc Oral: Dizziness, lightheadedness, swelling ankles/feet, or flushing may occur. If any of these effects last or get worse, tell your doctor or pharmacist promptly. To lower your risk of dizziness and lightheadedness, get up slowly when rising from a sitting or lying position. 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/irregular/pounding heartbeat, fainting. Although this medication is effective in preventing chest pain (angina), some people who already have severe heart disease </s>