Get advice for managing Multiple Sclerosis: Watch the video.

Generic Name: carbidopa/levodopa (KAR-bi-DOE-pa/LEE-voe-DOE-pa)
Brand Name: Sinemet

Sinemet is used for:

Treating symptoms associated with Parkinson disease and parkinsonism-like symptoms caused by other conditions. It may also be used for other conditions as determined by your doctor.

Sinemet is an antidyskinetic combination. Levodopa is transformed by the body and the brain into a substance that helps to decrease tremors and other symptoms of Parkinson disease. Carbidopa helps levodopa to reach the brain.

Do NOT use Sinemet if:

  • you are allergic to any ingredient in Sinemet
  • you have narrow-angle glaucoma, undiagnosed skin growths, skin cancer, or a history of skin cancer
  • you have taken a monoamine oxidase inhibitor (MAOI) (eg, phenelzine) within the last 14 days

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

Slideshow: 18 Herbal Supplements with Risky Drug Interactions

Herbal and Dietary Supplements Deserve Your Attention

Before using Sinemet:

Some medical conditions may interact with Sinemet. 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 a history of heart problems (eg, irregular heartbeat) or heart attack, blood pressure problems, endocrine problems, fainting, lung problems (eg, asthma), kidney or liver problems, neuroleptic malignant syndrome (NMS), a severe muscle problem called rhabdomyolysis, glaucoma or increased pressure in the eye, stomach or intestinal problems (eg, ulcers, bleeding), or mood or mental problems (eg, depression)

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

  • MAOIs (eg, phenelzine) because the risk of severe high blood pressure may be increased
  • Tricyclic antidepressants (eg, amitriptyline) because the risk of high blood pressure or unusual muscle movements may be increased
  • Metoclopramide because side effects may occur
  • Blood pressure medicines or selegiline because the risk of severe dizziness when standing may be increased
  • Butyrophenones, (eg, haloperidol), isoniazid, papaverine, phenothiazines (eg, chlorpromazine), phenytoin, or risperidone because they may decrease Sinemet's effectiveness

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

How to use Sinemet:

Use Sinemet as directed by your doctor. Check the label on the medicine for exact dosing instructions.

  • Take Sinemet by mouth with or without food.
  • Carefully follow the dosing schedule given to you by your health care provider. It may take several weeks to a few months to notice benefit from use because the dose is carefully adjusted over time.
  • If you are also taking iron salts (eg, ferrous sulfate), do not take them within 2 hours before or 2 hours after taking Sinemet. Check with your doctor if you have questions
  • Take Sinemet on a regular schedule to get the most benefit from it. Taking Sinemet at the same times each day will help you to remember to take it.
  • Diets that are high in protein may decrease your body's ability to absorb Sinemet. Discuss any questions or concerns with your doctor. Tell your doctor if you have a diet that is high in protein, or if you will be changing your diet to include more protein.
  • Continue to take Sinemet even if you feel well. Do not miss any doses.
  • If you have been taking levodopa, do not start taking Sinemet until at least 12 hours after your final dose of levodopa.
  • Do not suddenly stop taking Sinemet without checking with your doctor. Side effects may occur. They may include fever, stiff muscles, confusion, abnormal thinking, fast or irregular heartbeat, and sweating.
  • If you miss a dose of Sinemet, take it as soon as possible. If it is almost time for your next dose, skip the missed dose and go back to your regular dosing schedule. Do not take 2 doses at once.

Ask your health care provider any questions you may have about how to use Sinemet.

Important safety information:

  • Sinemet may cause drowsiness, dizziness, or lightheadedness. These effects may be worse if you take it with alcohol or certain medicines. Use Sinemet with caution. Do not drive or perform other possibly unsafe tasks until you know how you react to it.
  • Do not drink alcohol or use medicines that may cause drowsiness (eg, sleep aids, muscle relaxers) while you are using Sinemet; it may add to their effects. Ask your pharmacist if you have questions about which medicines may cause drowsiness.
  • Sinemet may cause dizziness, lightheadedness, or fainting; alcohol, hot weather, exercise, or fever may increase these effects. To prevent them, sit up or stand slowly, especially in the morning. Sit or lie down at the first sign of any of these effects.
  • Tell your doctor or dentist that you take Sinemet before you receive any medical or dental care, emergency care, or surgery.
  • Sinemet may cause mental or mood changes. Contact your doctor at once if any new or worsening symptoms such as depressed mood; anxious, restless, or irritable behavior; or unusual changes in mood or behavior occur. Contact your doctor right away if any signs of suicidal thoughts or actions occur.
  • You may experience an increase in involuntary movements while taking Sinemet. Check with your doctor if this occurs.
  • NMS is a possibly fatal syndrome that can be caused by Sinemet. Symptoms may include fever; stiff muscles; confusion; abnormal thinking; fast or irregular heartbeat; and sweating. Contact your doctor at once if you have any of these symptoms.
  • Patients with Parkinson disease may have an increased risk of developing a certain type of skin cancer (melanoma). It is not known if Sinemet also increases the risk of melanoma. You may need to have skin exams while you are using Sinemet. Tell your doctor if you notice any unusual skin growths or a change in the appearance of a mole. Discuss any questions or concerns with your doctor.
  • Some people have experienced new, unusual, or increased urges (eg, gambling, sexual urges) while taking Sinemet. Tell your doctor right away if you notice such effects.
  • Diabetes patients - Sinemet may cause the results of some tests for urine glucose or urine ketones to be wrong. Ask your doctor before you change your diet or the dose of your diabetes medicine.
  • Do not suddenly stop taking Sinemet. Some conditions may become worse when Sinemet is suddenly stopped. Your dose may need to be slowly lowered by your doctor to avoid side effects.
  • Gradually increase physical activity as your symptoms improve.
  • A dark color (red, brown, or black) may appear in your saliva, urine, or sweat after taking Sinemet. This is not harmful.
  • The effects of Sinemet might start to wear off between doses. Talk with your doctor if Sinemet stops working well or if your condition worsens.
  • Sinemet may affect certain lab test results. Make sure your doctors and lab personnel know you take Sinemet.
  • Lab tests, including complete blood cell counts and liver function, may be performed while you use Sinemet. These tests may be used to monitor your condition or check for side effects. Be sure to keep all doctor and lab appointments.
  • Use Sinemet with caution in the ELDERLY; they may be more sensitive to its effects.
  • Sinemet 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 taking Sinemet while you are pregnant. It is not known if Sinemet is found in breast milk. If you are or will be breast-feeding while you are taking Sinemet, check with your doctor. Discuss any possible risks to your baby.

Possible side effects of Sinemet:

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:

Confusion; constipation; diarrhea; dizziness; drowsiness; dry mouth; headache; increased sweating; loss of appetite; nausea; taste changes; trouble sleeping; upset stomach; urinary tract infection; vomiting.

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); black, tarry stools; blood in vomit; chest pain; confusion; depression; fast or irregular heartbeat; fever; hallucinations; mental or mood changes; muscle pain or unusual stiffness; new or increased involuntary movements; severe abdominal pain; severe lightheadedness or fainting; sore throat; thoughts of suicide; unexplained fever or sweating; unusual bruising or bleeding; unusual or painful movements or spasms of the face, eyelids, mouth, tongue, arms, hands, or legs; vision changes (blurred or double vision); 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. To report side effects to the appropriate agency, please read the Guide to Reporting Problems to FDA.

If OVERDOSE is suspected:

Contact 1-800-222-1222 (the American Association of Poison Control Centers), your local poison control center, or emergency room immediately.

Proper storage of Sinemet:

Store Sinemet at room temperature, between 59 and 86 degrees F (15 and 30 degrees C), in a tightly closed container. Store away from heat, moisture, and light. Do not store in the bathroom. Keep Sinemet out of the reach of children and away from pets.

General information:

  • If you have any questions about Sinemet, please talk with your doctor, pharmacist, or other health care provider.
  • Sinemet is to be used only by the patient for whom it is prescribed. Do not share it with other people.
  • If your symptoms do not improve or if they become worse, check with your doctor.
  • Check with your pharmacist about how to dispose of unused medicine.

This information should not be used to decide whether or not to take Sinemet or any other medicine. Only your health care provider has the knowledge and training to decide which medicines are right for you. This information does not endorse any medicine as safe, effective, or approved for treating any patient or health condition. This is only a brief summary of general information about Sinemet. It does NOT include all information about the possible uses, directions, warnings, precautions, interactions, adverse effects, or risks that may apply to Sinemet. This information is not specific medical advice and does not replace information you receive from your health care provider. You must talk with your healthcare provider for complete information about the risks and benefits of using Sinemet.

Issue Date: July 2, 2014
Database Edition 14.3.1.001
Copyright © 2014 Wolters Kluwer Health, Inc.

Disclaimer: This information should not be used to decide whether or not to take this medicine or any other medicine. Only your health care provider has the knowledge and training to decide which medicines are right for you. This information does not endorse any medicine as safe, effective, or approved for treating any patient or health condition. This is only a brief summary of general information about this medicine. It does NOT include all information about the possible uses, directions, warnings, precautions, interactions, adverse effects, or risks that may apply to this medicine. This information is not specific medical advice and does not replace information you receive from your health care provider. You must talk with your healthcare provider for complete information about the risks and benefits of using this medicine.

Hide
(web5)