Do anticonvulsants reduce the efficacy of oral contraceptives?

  title={Do anticonvulsants reduce the efficacy of oral contraceptives?},
  author={Carolyn B Coulam and John F. Annegers},
  volume={20 5},
Women in our area with epilepsy who were also taking oral contraceptives were identified. Of 82 patients taking oral contraceptives, 41 had used both anticonvulsants and oral contraceptives for a total of 955 months. Three documented oral contraceptive (pill) failures occurred during this period, whereas the expected number of 0.12 (relative risk, 25; 95% confience interval, 5 to 73). No pill failures were observed in 2,278 months among women with epilepsy who were taking oral contraceptives… CONTINUE READING

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