Antacids, iron salts, sucralfate, zinc salts; didanosine chewable buffered tablets, multivitamins (oral only) May decrease oral absorption of levofloxacin. Stagger administration times by at least 2 h.
Antiarrhythmic agents (class Ia [eg, quinidine] and class III [eg, amiodarone]) Because of increased risk of life-threatening cardiac arrhythmias, including torsades de pointes, avoid coadministration of levofloxacin.
Antidiabetic agents Hyperglycemia or hypoglycemia may occur.
Erythromycin, phenothiazines, tricyclic antidepressants, ziprasidone Risk of life-threatening cardiac arrhythmias may be increased.
NSAIDs May increase risk of CNS stimulation and convulsive seizures.
Warfarin May increase bleeding.
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