weight gain

by caroline
(lincoln uk)

hi i was wondering if anyone knows how to lose weight while on medication for crohns disease, i was on prednisone for 8 weeks but now only on pentassa and lansaprazole i am exercising over an hour a day and not eating fatty foods but still no weight loss, i have water retention and arthritis limits my movements but i have gained 2 stone and feeling very depressed about it all, any ideas gladly welcomed.