Prodrome: Unusual Experiences

Unusual experiences before psychosis may include fleeting suspiciousness, changes in perception or a sense that ordinary events carry special significance. The person may remain uncertain about their meaning and able to consider alternatives. Clinicians sometimes describe less intense or less persistent psychotic-like experiences as attenuated symptoms, depending on the assessment framework.

A prodrome is a period of changes that precedes a more clearly defined illness episode. In psychosis, early changes may involve functioning, mood, sleep or unusual experiences. The term is often applied retrospectively because many similar changes occur in people who never develop a psychotic disorder.

Such experiences are not uncommon in the wider population and do not automatically predict illness. Assessment considers distress, frequency, conviction and changes in functioning. Sleep loss, substances, trauma-related processes and other conditions may contribute. A calm discussion can help distinguish the experience itself from a frightening prediction about its future meaning. Support should be proportionate to the current needs. Clear information about when and how to seek reassessment can be more useful than prematurely assigning a fixed long-term diagnosis.

Attenuated experiences differ from established psychosis in intensity, persistence or conviction, depending on the assessment framework. A person may say that something feels meaningful while recognising it could be coincidence. That retained uncertainty is useful information. It should not be treated as proof of an inevitable transition, and support can focus on current distress and functioning rather than a predicted diagnosis.

Further reading: National Institute of Mental Health; NICE clinical guideline.