Welcome to Health Care Magic
are two different things. Ideas of some one chasing (Paranoid ideas) or Hearing voices (hallucinations
) point to Schizophrenia, though complete history is must in making diagnosis. He is aware of that some thing is going wrong, this is causing stress
Best in his case is to visit a Psychiatrist
and take opinion regarding his symptomatology, only sleep aid will not improve his symptoms.
You should give him warm support and care. He should confide in you as in later course he may become socially withdrawn, but if proper care is given at this stage then he will improve.
thanks and take care