Im not sure about the affect on the gains honestly i would tell your doctor about what your planning on doing if they dont want to give you good advice i would get a new doctor. The main thing that i would be worried about is that your on an anti d im assuming that one of the side effects is thoughts of suicide and aggression... depression and agression can also be a side affect of steroids. This would be my main concern

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Do not dwell in the past, do not dream of the future, concentrate the mind on the present moment. --buddah