My cousin was diagnosed with schizophrenia at an early age. He's in his late 30's now. He's reverted back to who he was when he was little. How do I help him?

He recently was put into assisted living as his folks couldn't take it anymore. From what I understand, he lashes out, is very very angry, disoriented, hears voices on a constant basis, etc. He was living with his folks for about 7 months and they couldn't get a handle on getting the right medications again. It's so odd to me as he was doing great for many, many years. I remember keeping in touch with him yearly and he would tell me that he's working the same job, had the same gf, and same old life. Then all of a sudden I hear he's not doing very well at all. I want to be there for him. He was very fond of me and I of him...he was seriously the sweetest person I've EVER met. So soft spoken, quiet, calm, and sweet. The person he is now, isn't who he is. I wish there was more I can do. As a matter of fact there is. I will be praying for him. He needs my fervent prayers. My question is, how do I help him? I want to go see him but I don't want him to feel uncomfortable. Recently I've heard from his folks that he doesn't even know what he's living for. Oh this just breaks my heart!!! Oh I love my cousin so much.... Help!!! Thank you all and may God bless you.