I think the rune Isa can ,, freeze" the effects of schizophrenia.
Also, i think you can use Wunjo
For Isa:
The energy of rune Isa calm my mind and vanquish the schizophrenia in the most favorable, pozitive and healthy way for me( You should adapt this affirmation if you want to use it in your native language).
Wunjio:
The effects of Wunjio heal my mind in totality in the most favorable, pozitive and healthy way for me...
Dont forget to choose a good number like 216 or to multiple or rune number