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Estrogens interact with liver enzyme-inducing drugs with increased metabolism of estrogens, which may reduce the estrogen effect. Interactions are documented for the following liver enzyme-inducing drugs: Oxcarbazepine, topiramate, felbamate, barbiturates, phenytoin, rifampicin, carbamazepine. Changes in estrogen serum concentrations may affect the results of certain endocrine or liver function tests.
No drug interactions are known for dydrogesterone.
Incompatibilities: Not applicable.
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