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Dr. Abby
Dr. Abby, Board Certified MD
Category: Health
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Experience:  Family Physician, practicing medicine for over 10 years, United States
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What is the exact reason why there is an interaction bet. lamictal

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What is the exact reason why there is an interaction bet. lamictal and birth control. I want to know in particular the actual scientific evidence that shows that birth control decreases the levels of lamictal.
Submitted: 4 years ago.
Category: Health
Expert:  Dr. Abby replied 4 years ago.
Hello,

Lamictal is metabolized (broken down) by a process called glucuronication.
Contraceptives have the ability to induce the enzymes that cause glucuronidation, thereby increasing the breakdown of lamictal (and therefore causing decreased levels of lamictal in the blood)

1. Sabers A, Buchholt JM, Uldall P, et al, “Lamotrigine Plasma Levels Reduced by Oral Contraceptives,” Epilepsy Res, 2001, 47(1-2):151-4. [PubMed 11673029]

Here is one article for you.

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