Disclaimer: The information contained herein should NOT be used as a substitute for the advice of an appropriately qualified and licensed physician or other health care provider. The tool is not a substitute for the care provided… (more)
“Phenobarbital (phenobarbitone), phenytoin, carbamazepine , oxcarbazepine, felbamate and topiramate have been shown to increase the metabolism of ethinylestradiol and progestogens.”
“Some antiepileptic drugs (e.g., phenytoin, phenobarbital, carbamazepine , and paramethadione) may cause more rapid metabolism of the progestin or estrogen component of combined oral contraceptives.”