PRECAUTIONS: Avoid drinking large amounts of beverages containing caffeine (coffee, tea, colas) or eating large amounts of chocolate. Caffeine can increase side effects of this medication. Smoking affects this medication. Be sure to tell your doctor if you smoke or use nicotine. Inform your doctor if you stop smoking. Your dose may need to be adjusted. This medication should be used during pregnancy only if clearly needed. Because small amounts of this drug appear in breast milk, consult with your doctor before breast-feeding. Tell your doctor your complete medical history especially if you are taking medicine (beta-blockers) for high blood pressure.
DRUG INTERACTIONS: Inform your doctor about all the medicines you use (both prescription and nonprescription), especially if you take: cimetidine, erythromycin, troleandomycin, mexiletine, tacrine, barbiturates, disulfiram, rifampin, thiabendazole, birth control pills, rifabutin, ticlopidine, quinolone antibiotics, beta-blockers, phenytoin, fluvoxamine (an SSRI antidepressant), St John's wort. Do not start or stop any medicine without doctor or pharmacist approval.
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