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Concurrent use with oral contraceptives may increase concentration of anticoagulant, caffeine, benzodiazepine, cyclosporin.
Increased oral contraceptive when concurrent use with atorvastatin or theophylline.
Decreased oral contraceptive concentration when concurrent use with Barbiturates, Carbamazepine, Griseofulvin, Phenytoin, Primidone, Rifabutin, Rifampin, Ritonavir, St. John's Wort, Troglitazone.
