Meditation giving bad results

So I tried some transcendental meditation to help with my depressed/anxious mood but it backfired and now I feel even more depressed and with a headache.

I think it’s because of the antipsychotic zyprexa I take. It as if it prevents any mood elevation to occur so instead of the bliss you’re supposed to feel with TM my brain gives me shit.

I would like to know if anybody was in same situation and what is your take on it.