I've always been sensitive to heat and sun given my skin being fair and sensitive, but my Seroquel XR and Tegretol make being in heat even rougher. Not only do I sweat profusely, especially if exercising, but I feel faint after a while. I also get heat rashes easily. Also, I don't tan. I burn and then peel.

I don't know if Lamictal does the same as above, but when I used to take doses like 200-300 mg I really sweat profusely, even without exercise or sun. I have only taken 100 mg of that med for the last 7 years. I don't have that side effect at this low dose.