LYCOS RETRIEVER 
Carbamazepine: Medicines
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Carbamazepine decreases the blood levels of hormonal contraceptives containing oestrogen and/or progesterone, which may make the contraceptive ineffective or result in breakthrough bleeding. Women taking this medicine who require contraception should be prescribed a contraceptive containing at least 50 micrograms of oestrogen, or use non-hormonal methods of contraception, such as condoms.
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Carbamazepine should not be used during pregnancy, but taking the medicine can make birth control pills less effective. Use a non-hormone method of birth control (not birth control pills) to prevent pregnancy while you are taking carbamazepine.
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Drugs other than those listed here may ... interact with Carbamazepine. Talk to your prescriber or health care professional about other medicines that may increase the effect of Carbamazepine before taking any prescription or over-the-counter medicines.
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