welcome to health care magic
Answers to your queries are as follows-
is a chronic illness which requires continuous medication. So don't stop his medication this time and consider long term treatment. You can consider hospitalisation initially as he is refusing treatment. Once he is stabilised and agrees to take treatment, you can easily continue treatment at home.
2) If you try force on such patients, they can get violent. Try to convince him calmly to visit a psychiatrist
(as he is refusing all this due to his delusions and hallucinations
). Secondly, if he is still refusing, continue giving medication without his knowledge and when he starts improving, take him to psychiatrist.
Hope it helps