CAN NOT HANDLE HOT WEATHER. Please help if you can?

I have never been able to handle hot weather. Even as a child, even when I was extremely thin, I've never ever been able to handle heat. Now I'm on two kinds of anti-depressants which make hot weather even more unbearable. Is there a medication I can take to help me not feel so horrible in hot weather? I don't feel uncomfortable - I feel miserable! thank you!