Do NOT use Vytorin if:

• you are allergic to any ingredient in Vytorin
• you have liver problems or ongoing abnormal liver function test results
• you are taking another medicine that contains simvastatin or ezetimibe
• you are taking an HIV protease inhibitor (eg, nelfinavir, lopinavir, ritonavir), itraconazole, ketoconazole, a macrolide or ketolide antibiotic (eg, clarithromycin, erythromycin, troleandomycin), mibefradil, or nefazodone
• you are pregnant or breast-feeding.

Contact your doctor or health care provider right away if any of these apply to you.

Some medical conditions may interact with Vytorin. 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 are a woman of childbearing age
• if you have kidney problems, muscle problems, or a family history of muscle problems; low blood pressure; uncontrolled seizures; or serious metabolic, endocrine, or electrolyte problems
• if you are scheduled for major surgery, have recently had a major trauma, or have a severe infection or history of alcohol abuse
• if you have had an organ transplant and are taking medicine to suppress a rejection reaction.

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

• Amiodarone, angiotensin-converting enzyme (ACE) inhibitors (eg, enalapril), azole antifungals (eg, itraconazole, ketoconazole), cyclosporine, danazol, delavirdine, diltiazem, fibrates (eg, clofibrate, fenofibrate), fluconazole, gemfibrozil, HIV protease inhibitors (eg, ritonavir), imatinib, macrolide antibiotics (eg, erythromycin), macrolide immunosuppressives (eg, tacrolimus), mibefradil, nefazodone, niacin, nicotinic acid, streptogramins, telithromycin, verapamil, or voriconazole because side effects, such as muscle pain, may occur
• Bosentan, carbamazepine, cholestyramine, hydantoins (eg, phenytoin), rifampin, or St. John's wort because they may decrease Vytorin's effectiveness
• Anticoagulants (eg, warfarin) because the risk of their side effects may be increased by Vytorin.

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

• Vytorin may cause dizziness, drowsiness, or changes in vision. These effects may be worse if you take it with alcohol or certain medicines. Use Vytorin with caution. Do not drive or perform other possible unsafe tasks until you know how you react to it.
• It may take several weeks for Vytorin to work.
• Proper dental care is important while you are taking Vytorin. Brush and floss your teeth and visit the dentist regularly.
• Vytorin may harm your liver. Your risk may be greater if you drink alcohol while you are using Vytorin. Talk to your doctor before you take Vytorin or other fever reducers if you drink more than 3 drinks with alcohol per day.
• Vytorin may cause injury to your muscles, especially when taken at higher doses or when taken with certain other medicines. Contact your doctor right away if you experience muscle pain, tenderness, or weakness, especially with a fever.
• Some patients taking Vytorin have reported poor memory or trouble sleeping. If you experience these effects, check with your doctor.
• Lab tests, including blood cholesterol levels, liver function tests, or muscle tests, may be performed while you use Vytorin. These tests may be used to monitor your condition or check for side effects. Be sure to keep all doctor and lab appointments.
• Vytorin should be used with extreme caution in children younger 10 years; safety and effectiveness in these children have not been confirmed.
• Pregnancy and breast-feeding: Do not use Vytorin if you are pregnant. Avoid becoming pregnant while you are taking it. If you think you may be pregnant, contact your doctor right away. It is not known if Vytorin is found in breast milk. Do not breastfeed while taking Vytorin.

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:

Diarrhea; flu-like symptoms; headache; pain in the arms or legs; tiredness; upper respiratory tract infection.

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

Severe allergic reactions (rash; hives; itching; difficulty breathing or swallowing; tightness in the chest; swelling of the mouth, face, lips, or tongue); blurred vision or vision changes; change in the amount of urine; chest pain; dark urine; depression; fast heartbeat; fever; loss of appetite; muscle tenderness, pain, or weakness; nausea; numbness, tingling, burning, or weakness in the arms, hands, feet, or legs; pale stools; stomach tenderness; unexplained pain in the stomach or mid-upper back; unusual bruising or bleeding; unusual tiredness; vomiting; 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.