Upekkha,
To add to what Lal, Tobias and firewrns said:
In my life I have taken only one single pill prescribed by a psychiatrist, an anti-depressant, and flushed the rest in the toilet. The effect on my brain was..heat at the temples and an almost uncontrollable restlessness of mind and body, wanting to eject myself out of my body. No voices, visions and hallucinations, though. The case is different from what you describe, but……
I have always mistrusted all oral medication. Not that they are not beneficial, most of them are, at least in the short run. But keep in mind that medicines are an industry. The primary aim is profit; even when the possibility of adverse side-effects is admitted, the product is put on the market nevertheless. When then it is announced that there are indeed side-effects, the product is immediately replaced by another one, so the business goes on. But it is you who has to go through those side effects.
So first thing I would stop taking all medication. Then, as suggested by the others above, concentrate on Dhamma in its various aspects. Unless something mundane takes priority at a given moment, for the rest of the time be mindful of the Buddha the Dhamma and the Sangha.
May the blessings of the Buddha, Dhamma and Sangha be with you always!