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metoprolol/hydrochlorothiazide - oral, Lopressor HCT (cont.)

DRUG INTERACTIONS: See also Precautions section.Your doctor or pharmacist 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 your doctor or pharmacist first.This drug should not be used with the following medications because very serious interactions may occur: cisapride, dofetilide.If you are currently using any of these medications, tell your doctor or pharmacist before starting this product.Before using this medication, tell your doctor or pharmacist of all prescription and nonprescription/herbal products you may use, especially of: fingolimod, lithium, mefloquine.Other medications can affect the removal of metoprolol from your body, which may affect how this product works. Examples include cimetidine, lumefantrine, quinidine, propafenone, ritonavir, SSRI antidepressants (such as fluoxetine), St. John's wort, among others.Check the labels on all your medicines (such as cough-and-cold products, diet aids, or NSAIDs such as ibuprofen, naproxen) because they may contain ingredients that could increase your blood pressure/heart rate or worsen your heart failure. Ask your pharmacist for more details.This product may interfere with certain laboratory tests (including parathyroid, protein-bound iodide, tyramine, and phentolamine 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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