Generic Name: metyrosine (meh-TYE-row-seen)
Brand Name: Demser
Metyrosine is used for:
Decreasing the amount of certain chemicals (catecholamines) in the body caused by a type of adrenal gland tumor (pheochromocytoma). It may be used either as a pretreatment before surgery or for the long-term treatment of symptoms associated with this disorder.
Metyrosine is a catecholamine synthesis inhibitor. It works by reducing the amount of catecholamines in the body.
Do NOT use metyrosine if:
- you are allergic to any ingredient in metyrosine
Contact your doctor or health care provider right away if any of these apply to you.
Before using metyrosine:
Some medical conditions may interact with metyrosine. Tell your doctor or pharmacist if you have any medical conditions, especially if any of the following apply to you:
- if you are pregnant, plan 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 drink alcohol or take medicines that can cause drowsiness
Some MEDICINES MAY INTERACT with metyrosine. Tell your health care provider if you are taking any other medicines, especially any of the following:
- Haloperidol or phenothiazines (eg, chlorpromazine) because the risk of extrapyramidal effects (eg, involuntary muscle movements of the head, neck, or limbs; speech difficulty; tremors) may be increased when taking metyrosine
- Medicines for sleep (eg, zolpidem), medicines for anxiety (eg, diazepam), or tranquilizers (eg, olanzapine) because severe drowsiness may occur
This may not be a complete list of all interactions that may occur. Ask your health care provider if metyrosine 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 metyrosine:
Use metyrosine as directed by your doctor. Check the label on the medicine for exact dosing instructions.
- Metyrosine may be taken with or without food.
- Drink plenty of fluids (at least 8 to 10 glasses per day) while taking metyrosine.
- If you miss a dose of metyrosine, 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 metyrosine.
Important safety information:
- Metyrosine may cause drowsiness. Do not drive, operate machinery, or do anything else that could be dangerous until you know how you react to metyrosine. Using metyrosine alone, with certain other medicines, or with alcohol may lessen your ability to drive or to perform other potentially dangerous tasks.
- Avoid drinking alcohol or taking other medications that cause drowsiness (eg, sedatives, tranquilizers) while taking metyrosine. Metyrosine will add to the effects of alcohol and other depressants. Ask your pharmacist if you have questions about which medicines are depressants.
- Before you have any medical or dental treatments or surgery, tell the doctor or dentist that you are taking metyrosine.
- Metyrosine is not recommended for use in CHILDREN younger than 12 years of age. Safety and effectiveness in this age group have not been confirmed.
- PREGNANCY and BREAST-FEEDING: If you are pregnant or plan on becoming pregnant, discuss with your doctor the benefits and risks of using metyrosine during pregnancy. It is unknown if metyrosine is excreted in breast milk. If you are or will be breast-feeding while you are using metyrosine, check with your doctor or pharmacist to discuss the risks to your baby.
Possible side effects of metyrosine:
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:
Seek medical attention right away if any of these SEVERE side effects occur:
Moderate to severe drowsiness.
Severe allergic reactions (rash; hives; difficulty breathing; tightness in the chest; swelling of the mouth, face, lips, or tongue); anxiety; confusion; crystals in the urine; depression; diarrhea; difficulty speaking; disorientation; drooling; hallucinations; painful urination; speech difficulty; swelling of the arms, legs, ankles, or feet; tremor.
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. Symptoms may include diarrhea; dry mouth; severe drowsiness; tightening of the jaw; tremor of the hands and body.Proper storage of metyrosine:
Store metyrosine at room temperature between 68 and 77 degrees F (20 and 25 degrees C) away from heat, moisture, and light. Do not store in the bathroom. Keep metyrosine out of the reach of children and away from pets.
- If you have any questions about metyrosine, please talk with your doctor, pharmacist, or other health care provider.
- Metyrosine 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 metyrosine 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 metyrosine. It does NOT include all information about the possible uses, directions, warnings, precautions, interactions, adverse effects, or risks that may apply to metyrosine. 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 metyrosine.
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.