Her symptoms look like psychosis which needs treatment. Often patients are unable to understand their own illness because they are detached from reality. The doctor should be able to coax her into taking the medication, perhaps create a homely atmosphere in the hospital and 1 family member could stay with her.
Health Tips
One should not challenge, scold, confront such patients as it'll make them more suspicious, alienated, non cooperative. Whenever she is in good mood, logical and rational, someone should ask her nicely to take the medicine and treatment. It can also be slipped into their food under doctors guidelines.