Weight and antipsychotics

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I'm taking an antidepressant and antipsychotic for my depression. Recently I've been told to increase the antipsychotic dose again, but I'm already overweight (quite apart from not wanting to feel more knocked out).

Does anyone know any good ways to lose weight (or reduce how much you put on) with these sort of drugs?

I have put on weight since starting ADs and am finding it really hard to lose it, i dont think the actual ADs were to blame, just the feeling more hungry as i started to feel better ( so i suppose it was the ADs but in a round about way )
Im not sure about the antipsychotics but there is some info on here.

ps.psychiatryonline.org/cgi/content/full/54/8/1155