Different Medications affect different people in different ways. No 2 bodies are the same. Lamotrogine is working a gem for me. My seizures aren't as frequent & it is not taking too long to come back around after a seizure.

Had tremors also. Keppra made me mean...only took keppra for a few weeks, it was horrible.

I have been on lamotrigine for 20 years and it took 3months for my neurologist to decide what the correct amount for me to take would be.
Initially I was very dizzy, I had double vision, my balance was completely out of sync I felt and looked drunk! but from discussing all the side effects we managed to find the right amount my body could handle with no side effects hence I've been on it for 20 years with no side effects once the correct dose was sorted.

I've been taking both of those together for quite a while and they seem to be effective. I do get tremors though and very little but I do have some depression at times. It may not be the pills though. I'm not sure. I do know there are certain ones that can't be taken together though. I was on i believe lamotragine and carbamzapine and it caused a bad case of vertigo and dizziness as well as double vision. Not fun.

3 weeks to a month. Then again if dose goes up.
The rash- call doctor without delay. It's necrosis. You gotta come off ASAP if you see it.