Tell your health care provider if you have any medical conditions, especially if any of the following apply to you:

• if you are 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 seizures (eg, epilepsy), migraines, heart problems, kidney problems, or a history of depression
• if you have a history of high blood pressure, diabetes, high blood cholesterol, lupus, or blood clots, or if a member of your family has had these problems
• if you smoke or are very overweight 

Some MEDICINES MAY INTERACT with Aygestin. Tell your health care provider if you are taking any of the following medicines:

• Aprepitant, carbamazepine, felbamate, griseofulvin, HIV protease inhibitors (eg, ritonavir), hydantoins (eg, phenytoin), modafinil, nevirapine, rifampin, St. John's wort, or tetracyclines because they may decrease Aygestin's effectiveness
• Corticosteroids (eg, prednisone), theophylline, or troleandomycin because the risk of their side effects may be increased by Aygestin
• Beta-adrenergic blockers (eg, propranolol), lamotrigine, or thyroid medicines because their effectiveness may be decreased by Aygestin

This may not be a complete list of all interactions that may occur. Ask your health care provider if Aygestin 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.

All medicines may cause side effects, but many people have no, or minor, side effects. Check with your doctor if any of these most COMMON side effects persist or become bothersome:

Acne; changes in menstrual flow, including breakthrough bleeding, spotting, or missed periods; dizziness; drowsiness; fever; headache; hot flashes; nausea; nervousness; pain; rash; stomach pain; trouble sleeping; weakness; weight gain or loss.
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; depression; lumps in the breast or under the armpits; migraine headache; partial or complete loss of vision or changes in vision; shortness of breath; slurred speech; sudden loss of coordination; sudden or severe headache; sudden severe headache, dizziness, vomiting, or fainting; swelling of fingers or ankles; tenderness, pain, or swelling of the calf; weakness, numbness, or pain in the arms or legs; yellowing of the skin or eyes.

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. Call your doctor for medical advice about side effects.