Please help! Has anyone gotten a rash from Lamictal?

My daughters been increased to 300mgs of lamictal now. She was fine then all of the sudden she has a rash on her arms, back and chest.

I'm wondering if this happened because she was taking all 300mgs at once instead of as directed by her doctor.

And if the rash is caused by it, what do they do? I'm terrified that she's going to have to stop taking it and then we have to start all over again. She's been on it for almost 2 years now, so I thought we wouldn't have to worry about the rash anymore??

Suggestions welcomed.

Thanks!