My daughter is on Lamictal and we were told by the nurse practitioner that IF she were to get a headache peppermint oil (for the aroma) and peppermint tea sometimes help. We never had the headaches but I thought I would pass on that information.
As far as the rash, it's rare and can be avoided by increasing the med slowly...IF she does get the rash tell her not to take another dose of the med until it is evaluated by a dermatologist and discussed with her pdoc. My daughter developed a few rashes which were not the Steven Johnson Syndrome rash that is the dangerous one. So don't get too concerned about the rash....Lamictal is a great med with the least side effects and when it works it is said to be the "magic bullet" by many.
Also, the side effects of meds often subside after a period of time so giving them at least a month before giving up on them is usually the rule of thumb.
I hope that things improve for your daughter and that she eventually finds the med that will help.
~ Goody