DRUG INTERACTIONS: Your health care professionals may already be aware of any possible drug interactions and may be monitoring you for them. Do not start, stop, or change the dosage of any medicine before checking with them first.This drug should not be used with the following medications because very serious interactions may occur: epinephrine for low blood pressure, metrizamide, narcotic blockers (e.g., naltrexone, naloxone), sibutramine.Avoid taking MAO inhibitors (e.g., furazolidone, isocarboxazid, linezolid, moclobemide, phenelzine, procarbazine, rasagiline, selegiline, tranylcypromine) within 2 weeks before, during, and after treatment with this medication. In some cases, a serious (possibly fatal) drug interaction may occur.If you are currently using any of these medications listed above, tell your doctor or pharmacist before starting meperidine.Before taking this medication, tell your doctor or pharmacist of all prescription and nonprescription/herbal products you may use, especially of: acyclovir, anticholinergics (e.g., benztropine, belladonna alkaloids), cimetidine, certain other pain medications (e.g., narcotic agonist/antagonist such as butorphanol/nalbuphine), phenytoin, ritonavir.Also report the use of drugs that might increase seizure risk when combined with meperidine such as bupropion, isoniazid (INH), phenothiazines (e.g., thioridazine), theophylline, or tricyclic antidepressants (e.g., amitriptyline), among others. Consult your doctor or pharmacist for details.Tell your doctor or pharmacist if you also take drugs that cause drowsiness such as: certain antihistamines (e.g., diphenhydramine), anti-seizure drugs (e.g., carbamazepine), medicine for sleep or anxiety (e.g., alprazolam, diazepam, zolpidem), muscle relaxants, narcotic pain relievers (e.g., codeine), psychiatric medicines (e.g., chlorpromazine, risperidone, amitriptyline, trazodone).Check the labels on all your medicines (e.g., allergy, cough-and-cold products) because they may contain drowsiness-causing ingredients. Ask your pharmacist about using those products safely.This medication may interfere with certain laboratory tests (e.g., amylase, lipase 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.
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