Mood Disorders Expert Forum
Lamictal & menstruation
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Welcome to the Mood Disorders Forum. Questions in this forum are being answered by Peter Forster, MD and topics covered are anxiety, bipolar, depression, panic disorder, post traumatic stress disorder and stress.

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994257 tn?1266246292
Lamictal & menstruation
I am currently taking 400mg of Lamictal ODT for bipolar II disorder and to help in the treatment of migraines my periods are coming later and later every month and they are really light.  Is this common for this medication.  Also I'm not actively trying to get pregnant but if I do what are the risks of staying on it or should I stop immediately?
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Avatar universal
Hi I have Bipolar but I have never taken Lamictal, but I am on Sodium Valproate and have been on Lithium aswell. I do know that Lamictal can cause menstrual irregularities, I'm not suprised to hear that your cycle has got longer and that it is lighter.
I know that with this group of medicines pregnancy is contraindicated and birth defects have been reported. I couldn't be exact about Lamictal but I would definitely stop taking it immediately if I was to become pregnant.
You need to discuss methods of birth control because Lamictal can react with certain contraceptive pills etc.
Goodluck, and keep well :)
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1308134 tn?1295191219
Lamictal induces the metabolism of estrogen (which is why oral contraceptives may not be as effective, especially low dose estrogen ones) and that is probably why your cycles are irregular.
You should talk to your doctor about what to do, sometimes it might make sense to take an oral contraceptive to counteract this effect of Lamictal.
You should also definitely talk to your doctor about getting pregnant, this is something that takes some thought (balancing risks and benefits of various approaches to treatment during the period of trying to get pregnant).
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