serious schizophrenia

my friend julia has a son, tim who is 18 and he has been diagnosed with schizophrenia for about a year. They have been giving him risperdal without him knowing, because he is extremely stubborn and thinks that he can cure it by himself by simply eating well, so there is no choice but to hide it in his juice every morning and night. My friend julia believes in orthomolecular psychiatry wich consists in taking niacin and vitamin c to cure schizophrenia, but tim also refuses to take that as well, and julia thinks that it wouldn't be a good idea to also hide it in his juice as the risperdal. I also think that is a good idea; he need to know that he is taking the vitamins. Over the last 6 months Julia started tapering the pill and was already by less than half when three days ago, it started getting serious. Since they diagnosed tim with skitzo he always had a very slurred speech and couldn't express himself and said that he heard voices. with risperdal the effects lightened but still occured, but three days ago the effects worsened and every time he walked he would stop for 30 seconds and just stood there. two days ago I got a call from Julia saying that tim was worse than ever and that he couldn't move or talk and couldn't drink or eat. he was just like a statue breathing and staring. I went to see him for myself and it was horrible. He wouldn't speek a word or would'nt even move. And the worst part was that julia could'nt give him the risperdal since he wouldn't drink. today Julia called me to tell me that rim was still really bad, but that he had taken the juice with the pill in it but that he still wasn't moving, talking, etc.. Julia is really deperate right now and any help or advice or anything would be greatly appreciated.