DRUG INTERACTIONS: See also How to Use Section.Your healthcare professional (e.g., doctor or pharmacist) may already be aware of any possible drug interactions and may be monitoring you for it. Do not stop or change the dosage of any medicine without checking with them first.This drug should not be used with the following medications because very serious interactions may occur: tetrabenazine.Taking MAO inhibitors with this medication may cause a serious (possibly fatal) drug interaction. Avoid taking MAO inhibitors (isocarboxazid, linezolid, methylene blue, moclobemide, phenelzine, procarbazine, tranylcypromine) during treatment with this medication. Most MAO inhibitors should also not be taken for two weeks before treatment with this medication. However, certain MAO inhibitors (rasagiline, selegiline) may be used with careful monitoring by your doctor. Ask your doctor when to start or stop taking this medication.Before using this medication, tell your doctor or pharmacist of all prescription and nonprescription/herbal products you may use, especially: other drugs to treat Parkinson's disease (e.g., all levodopa-containing products, benztropine, entacapone), medicine for high blood pressure (e.g., guanethidine, methyldopa, reserpine), antidepressants (e.g., tricyclics such as amitriptyline/nortriptyline), antipsychotics (e.g., chlorpromazine, thioridazine, risperidone), metoclopramide, phenytoin, papaverine, certain sedatives (e.g., benzodiazepines such as chlordiazepoxide/diazepam), tryptophan (e.g., l-tryptophan, oxitriptan).This medication may interfere with certain laboratory tests (including urine catecholamine/glucose/ketone tests), possibly causing false test results. Make sure laboratory personnel and all your doctors know you use this drug.This document does not contain all possible interactions. Therefore, before using this product, tell your doctor or pharmacist of all the products you use. Keep a list of all your medications with you, and share the list with your doctor and pharmacist.
Report Problems to the Food and Drug Administration
You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.
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