honestly buddy from my reading steroids dont help you lose weight - they can only accelerate or improve the rate at which one is able to burn calories and or maintain muscle mass while one does -
paxil affects leptin in the human body - thats probably why your gaining the weight you are ...
i know its a bit late now ... but omega 3 fatty acids and along with vitamin E will help increase leptin ...
also when u get off paxil the weight should drop off again
Paxil: weight gain - Mental Health