Oneirophrenia is a hallucinatory, dream-like, state
caused by several conditions such as prolonged sleep deprivation, sensory deprivation, or drugs
(such as ibogaine).
It has some of the characteristics of simple schizophrenia, such as a confusional state
and clouding of consciousness, but without presenting the dissociation symptoms
which are typical of this
by oneirophrenia have
a feeling of dream-like unreality which
in its extreme form may progress to delusions
and hallucinations. Therefore, it is considered a schizophrenia-like acute form of psychosis which
remits in about 60% of cases within a period of two years. It is estimated
that 50% or more of schizophrenic patients present oneirophrenia at least once.