The medical name of the illness that Heather Evans (Kim Basinger) was said to have in the film was "pathological intoxication" which is a true real-life medical disorder that can exist. Also known as "pathological alcohol intoxication", according to M.H. Hollender in the Journal of Clinical Psychiatry, the condition "appears as a diagnostic term in DSM-II and DSM-III, is defined in a psychiatric dictionary and is described in several textbooks".
This was the second movie in about five years where actress Kim Basinger portrayed a character who underwent a dramatic personality change after drinking alcohol. The first film had been in Blake Edwards' comedy Blind Date (1987).