Way too broad to really speak upon. I will express something I saw, my ex's mother was schizophrenic. It took years for her to find help, while her daughter for the longest time had to be her mother's caregiver at the age of 9. When she could no longer, her father stepped in (who was absent, but I do believe cared), took her away from her mother from seeing too late what was going on. She then saw her mother in back alleys, as her mother needed to be away from being seen. It was only when her mother accepted help, they truly had a relationship again. It took treatment in a mental health hospital, then years of medication. Medication she can't stop. Her mother did stop, by accident years ago, found how she was feeling better physically for a short period of time. Then all the troubles she had with her mother years before slowly started to reappear, and was alienating everyone in her life again. She was on a path of homelessness again, and a part my ex saw she needed to see, her mum was clear and clairvoyant, but no longer able to have functioning relationships (again). My ex went to a justice of the peace, as she could not watch her mother undue all of her progress, even though she knew the medication hurt in another way.

Once she had access to seeing what her mother was taking again, she was able to plead with her mother to listen. They had to put her mother on a different medication, as the previous one, once outside her system, could not be given again, but everything I know from that story, they have a much more loving relationship now together that would have been lost.

All that said, though, we do live in a world that prescribes before listening. Don't know why you are asking, and medication may not be the only thing that helps; but don't close down the idea either.