Can lamictal be prescribed before bedtime or is it to activating?

Varies: Some people take it at bedtime without any problems, however it can cause insomnia in about 10% of people. Discuss with your doctor and if you would like to try before bed, you can always do a trial and see how you react. Best wishes.

Yes, it can.: It actually can cause drowsiness. Remember to keep an eye out for unexplained rashes. One serious side effect of lamictal is a dangerous rash. Hope this helps.