I understand ur concern. But no medicine is side effect free.even ur simple paracetamol has side effects. However since benefit outweigh risk we use them. If ur son has psychosis which occurs due to chemical imbalance in brain antipsychotics will only help in correcting imbalance.
Next Steps
Before considering homeopathy kindly research about the effectiveness of homeopathy med in psychosis. u are free to choose treatment option
Health Tips
Kindly consult a mental health professional for timely intervention