PRECAUTIONS: Before taking zafirlukast, tell your doctor or pharmacist if you are allergic to it; or to other leukotriene blockers (e.g., montelukast); or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.Before using this medication, tell your doctor or pharmacist your medical history, especially of: liver problems.Caution is advised when using this drug in the elderly because they may be more sensitive to the side effects of the drug, especially headache, diarrhea and nausea.This medication should be used during pregnancy only if clearly needed. Discuss the risks and benefits with your doctor.This medication passes into breast milk. Breast-feeding while using this medication is not recommended. Consult your doctor before breast-feeding.
DRUG INTERACTIONS: Drug interactions may change how your medications work or increase your risk for serious side effects. This document does not contain all possible drug interactions. Keep a list of all the products you use (including prescription/nonprescription drugs and herbal products) and share it with your doctor and pharmacist. Do not start, stop, or change the dosage of any medicines without your doctor's approval.Other medications can affect the removal of zafirlukast from your body, which may affect how zafirlukast works. Examples include macrolide antibiotics (such as erythromycin), among others.This medication can slow down the removal of other medications from your body, which may affect how they work. Examples of affected drugs include theophylline, warfarin, among others.
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