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(za fir' loo kast)
Before taking zafirlukast,
- tell your doctor and pharmacist if you are allergic to zafirlukast or any other medications.
- tell your doctor and pharmacist what prescription and nonprescription medications, vitamins, nutritional supplements, and herbal products you are taking or plan to take. Be sure to mention any of the following: anticoagulants ('blood thinners') such as warfarin (Coumadin); aspirin or aspirin-containing products; calcium channel blockers such as amlodipine (Norvasc, in Caduet), diltiazem (Cardizem, Tiazac), felodipine (Plendil), isradipine (Dynacirc), nicardipine (Cardene), nifedipine (Adalat, Procardia, others), nimodipine (Nimotop), nisoldipine (Sular), or verapamil (Calan, Covera, Isoptin, Verelan); carbamazepine (Equetro, Tegretol); cisapride (Propulsid) (not available in the U.S.); cyclosporine (Neoral, Sandimmune); erythromycin (E.E.S, Erythrocin); phenytoin (Dilantin); theophylline (Theo-Dur, others); and tolbutamide. Other medications may also interact with zafirlukast, so be sure to tell your doctor about all the medications you are taking, even those that do not appear on this list. Your doctor may need to change the doses of your medications or monitor you more carefully for side effects.
- tell your doctor if you have or have ever had liver disease.
- tell your doctor if you are pregnant or plan to become pregnant. If you become pregnant while taking zafirlukast, call your doctor.
- do not breastfeed while you are taking zafirlukast.
- you should know that your mental health may change in unexpected ways while you are taking zafirlukast. You should call your doctor right away if you experience any of the following symptoms: agitation, aggressive behavior, anxiety, irritability, unusual dreams, hallucinations (seeing things or hearing voices that do not exist), depression, difficulty falling asleep or staying sleep, restlessness, suicidal behavior (thinking about harming or killing yourself or planning or trying to do so), or tremor (uncontrollable shaking of a part of the body). Your doctor will decide if you should continue taking zafirlukast.
- loss of appetite
- pain in the right upper part of your stomach
- excessive tiredness
- lack of energy
- yellowing of the skin or eyes
- flu-like symptoms
- swelling of the eyes, face, lips, tongue, or throat
- difficulty breathing or swallowing
- pain, burning, numbness, or tingling in the hands or feet