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Gabapentin Does Not Interact with a Contraceptive Regimen of Norethindrone Acetate and Ethinyl Estradiol
Neurol 50:1146-1148, Eldon,M.A.,et al, 1998
See this aricle in Pubmed

Article Abstract
Anticonvulsants that induce hepatic metabolism increase clearance of oral contraceptive hormones and thereby cause contraceptive failure.Gabapentin is not metabolized in humans and has little liability for causing metabolic-based drug-drug interactions.In healthy women receiving 2.5 mg norethindrone acetate and 50 ug ethinyl estradiol daily for three consecutive menstrual cycles,concurrent gabapentin administration did not alter the steady-state pharmacokinetics of either hormone.Thus,gabapentin is unlikely to cause contraceptive failure.
 
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anticonvulsants
anticonvulsants,effectiveness
anticonvulsants,untoward effects of
drug interactions
efficacy
enzyme,induction
gabapentin
oral contraceptives
seizure,women

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