I was put on
Lamictal in the fall, this was the first time being on a med. I was started at 25mg and bumped up in 25mg increments. I did experience some headache, muscle aches for the first week, and then again on the second increase for about a week.
For me the benefits were almost immediate, never felt like a zombie, or drowsy. The depression subsided quickly ( within days), I still have problems with sleep, but am in a much better way mentally.
Hope this helps and best of luck