how can you convince a family member to keep a relative in a medical hospital for treatment of psychosis?

[Janet712inEngland]

Vina, it isn't your other family member's decision about leaving him in hospital. It's up to the doctors. If they believe he is stable and won't harm himself or others, they will send him home.

It isn't legal for the medical people to talk to others about the care they are giving a mental patient (unless he gives permission for this), because that's private information. HOWEVER, it is NOT illegal for you to communicate to the doctors in a one-way fashion. For example, you might write a letter to his psychiatrist and explain that you know a lot about him and you're not sure how much of this has come out already, but here's the story: then give them all you know. Be specific in your letter but don't write more than about 1 1/2 pages. Keeping it short makes you look like you've got your act together. Number your points and give examples, e.g.:

1) He is very manipulative. For example, he convinced our parents to give him lots of money that we all knew he was going to spend on drugs.
2) He has been talking about suicide consistently for three years, ever since our grandfather died.
3) He has hurt others physically but we have not reported it. On such-and-such date, he broke a table and then grabbed me around the neck.... etc.
4) He tells all of us that he will refuse to take medication once he leaves and we really, really don't trust him.

You get the picture.

So, providing information is helpful. Then --- it's up to the doctors to do what they need to do.