• you are allergic to any ingredient in Dipyridamole.

Some medical conditions may interact with Dipyridamole. Tell your doctor or pharmacist if you have any medical conditions, especially if any of the following apply to you:

• if you are pregnant, planning to become pregnant, or are breast-feeding
• if you are taking any prescription or nonprescription medicine, herbal preparation, or dietary supplement
• if you have allergies to medicines, foods, or other substances
• if you have asthma; chest pain (angina); heart disease; heart block; or abnormal, rapid, slow, or irregular heartbeat
• if you have severe muscle weakness.

Some medicines may interact with Dipyridamole. Tell your health care provider if you are taking any other medicines, especially any of the following:

• Theophyllines (eg, aminophylline) because they may decrease Dipyridamole's effectiveness
• Adenosine because the risk of its side effects, including low blood pressure and irregular heartbeat, may be increased by Dipyridamole
• Anticholinesterases (eg, pyridostigmine) because their effectiveness may be decreased by Dipyridamole.

This may not be a complete list of all interactions that may occur. Ask your health care provider if Dipyridamole may interact with other medicines that you take. Check with your health care provider before you start, stop, or change the dose of any medicine.

Important safety information:

• Dipyridamole may cause dizziness. These effects may be worse if you take it with alcohol or certain medicines. Use Dipyridamole with caution. Do not drive or perform other possible unsafe tasks until you know how you react to it.
• Avoid food or drink that has caffeine (eg, coffee, tea, cocoa, cola, chocolate) before you use Dipyridamole.
• Dipyridamole should not be used in children; safety and effectiveness in children have not been confirmed.
• Pregnancy and breast-feeding: If you become pregnant, contact your doctor. You will need to discuss the benefits and risks of using Dipyridamole while you are pregnant. Dipyridamole is found in breast milk. Do not breastfeed while taking Dipyridamole.

Check with your doctor if any of these most common side effects persist or become bothersome:

Dizziness; fatigue; flushing; headache; nausea.

Seek medical attention right away if any of these severe side effects occur:

Severe allergic reactions (rash; hives; itching; difficulty breathing; tightness in the chest; swelling of the mouth, face, lips, or tongue); chest pain; confusion; fast, irregular, or slow heartbeat; one-sided weakness; seizures; slurred speech.

This is not a complete list of all side effects that may occur. If you have questions about side effects, contact your health care provider.