Sooner or later, when a family member has schizophrenia or a major affective disorder, a serious crisis will occur. When this happens there are some actions you can take to reduce or avoid the potential for disaster.
Ideally, you need to reverse any worsening of the psychotic symptoms (psychotic means out of touch with reality) as well as reducing the delusional thinking (believing you have millions in the bank or that you have powers from God are two examples of delusional thinking). At this time you need to provide immediate protection and support to the ill person.
Seldom, if ever, will a person suddenly lose total control of thoughts, feelings and behaviour. Family members or close friends will generally become aware of a variety of behaviour which gives rise to mounting concern: sleeplessness, ritualistic preoccupation with certain activities, being suspicious, unpredictable outbursts, very bizarre behaviour, etc.