LYCOS RETRIEVER 
Singulair: Doctors
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Take Singulair exactly as it was prescribed for you. Do not take the medication in larger amounts, or take it for longer than recommended by your doctor. Follow the directions on your prescription label. Singulair is usually taken once daily in the evening for prevention of asthma or allergy symptoms. For exercise-induced bronchoconstriction, take a single dose at least 2 hours before you exercise, and do not take another dose for at least 24 hours. Follow your doctor's instructions.
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If Singulair is taken with certain other drugs, the effects of either could be increased, decreased, or altered. It is especially important to check with your doctor before combining Singulair with the following: Phenobarbital, Rifampin (Rifadin, Rifamate, Rimactane).
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This list is not complete and there may be other drugs that can interact with Singulair. Tell your doctor about all the prescription and over-the-counter medications you use. This includes vitamins, minerals, herbal products, and drugs prescribed by other doctors. Do not start using a new medication without telling your doctor
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After you begin taking Singulair, your doctor may be able to slowly reduce the dosage of other asthma medications such as inhaled steroids. However, Singulair is not a complete replacement for such drugs, so you should not abruptly stop using them unless your doctor recommends it. If your asthma symptoms get worse or you develop a rash, numbness, or heart problems as you reduce your dose of steroids, check with your doctor. Such reactions usually result from a reduction in oral steroid therapy.
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Before using Singulair, tell your doctor if you are allergic to any drugs (especially aspirin), or if you have liver disease. You may not be able to use Singulair, or you may need dosage adjustments or special tests during treatment.
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It's a good idea to call your doctor any time that you do not have the expected effect from one of your asthma medicines, whether Singulair or something else. In addition, if you have any of the following symptoms, you should call your doctor right away:
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