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 them first.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.Before using this medication, tell your doctor or pharmacist of all prescription and nonprescription/herbal products you may use, especially of: other asthma drugs (e.g., levalbuterol, salmeterol), some beta blockers (such as propranolol), inhaled anesthetics (e.g., halothane, isoflurane), other sympathomimetic drugs (e.g., ephedrine, epinephrine), tricyclic antidepressants (e.g., amitriptyline, nortriptyline), certain "water pills" (diuretics that cause potassium loss such as furosemide, hydrochlorothiazide).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.