 <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]  medications (such as sublingual nitroglycerin) to relieve attacks of chest pain as directed by your doctor. Consult your doctor or pharmacist for details.Older adults should discuss the risks and benefits of this medication with their doctor or pharmacist, as well as other possibly safer forms of nifedipine (such as the long-acting tablets). How to use Procardia Take this medication by mouth with or without food as directed by your doctor, usually 3 times daily. Swallow this medication whole. Do not crush, chew, or break the capsule. 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. Avoid eating grapefruit or drinking grapefruit juice while using this medication unless your doctor or pharmacist says you may do so safely. Grapefruit can increase the chance of side effects with this medicine. Ask your doctor or pharmacist for more details. Use this medication regularly to get the most benefit from it. To help you remember, take it at the same times each day. Tell your doctor if your condition worsens (for example, your chest pain worsens or is more frequent).The side effects of Procardia Oral: Dizziness, </s>