Posted 5/30/2013 4:24 AM (GMT 0)
Hi Holy Diver,
I was on Lamictal for a little over a year, when my docs were questioning whether or not I was bipolar II (I am not). I was taking it as a mood stabilizer, not for pain. I was on 200 mg (the maximum dose), and I never really thought that it did anything for me, which is why we ultimately stopped it. I have heard some obscure things about it being used for pain, but it certainly did not help my pain at all.
Spinal soldier is right that lamictal is thought to have some NMDA receptor antagonist potential. However, the actual mechanism of action of this drug is still not completely understood. Current thought is that the NMDA receptor (or at least one subtype of NMDA receptors) is involved in the glutamatergic transmission of pain signals within the brain and spinal cord. However, the efficacy of NMDA receptor antagonists for the treatment of neuropathic pain is still controversial. NMDA receptor antagonists are use dependent on the molecular level, meaning that they exert their action only when the receptor is stimulated. Therefore, the effect of the drug is completely dependent on the level of activation of the targeted pathways. The more active the pathway, the stronger the block. It is a bit difficult to explain without getting into the actual neurochemistry. NMDA receptor antagonists are also thought to help reduce opioid tolerance, but again, this has not been scientifically proven, and is still controversial.
I do hope that your doctor stressed how dangerous starting this drug can be if not done exactly as directed. Please don't change your dose to twice daily (even if you are dividing a dose) unless told to do so, or okayed by your doctor. If you increase this medication too quickly, you can develop a life threatening condition, the first sign of which is a skin rash. Your doctor should have given you information about how to recognize this particular rash. However, if you develop ANY kind of rash while on or starting lamictal, you need to tell you doctor right away, and stop the drug immediately. It may be nothing, but it is not worth finding out. People DO die from the Steven-Johnsons rash. I don't mean to scare you or anyone else. The risk of developing the rash is slim, but the potential for it can't be emphasized enough, as if you are one of the few who gets it, it is very serious.
I hope the lamictal helps you! Keep us posted & let us know how it goes!
Skeye