HAHAHAHAHA: Apparently genuine cases of ghost possession (in this case, patient's criminal behavior was due to episodic ghost possession) can be exorcism-resistant; clopenthixol may relieve symptoms

Exorcism-resistant Ghost Possession Treated with Clopenthixol. Anthony S. Hale and Narsimha R. Pinninti. The British Journal of Psychiatry, Volume 165, Issue 3. September 1994, pp. 386-388. https://doi.org/10.1192/bjp.165.3.386

Abstract
Background: An Indian man now in Britain explained his criminal behaviour as episodic ghost possession. Traditional exorcisms failed to help.
Method: ‘Western’ diagnosis of dissociative state or paranoid schizophrenia was made. Treatment commenced using trifluoperazine and clopenthixol.
Results: The patient underwent remission during neuroleptic treatment, despite previous evidence of genuine possession.
Conclusions: Many cultures give rise to apparently genuine cases of ghost possession. Neuroleptics may relieve symptoms of exorcism-resistant possession.

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A 22-year-old unemployed Hindu Indian male, in Britain with his family since the age of six, was interviewed while remanded for theft of a taxi, robbery, and kidnap of the driver. [...]
His parents initially would not listen, fearing stigma, but eventually consulted local religious leaders. They sent him to holy places in India where he was exorcised, by a Hindu priest and later a Moslem peer. Impatient with the failure, which seemed to increase the ghost's anger, he unsuccessfully consulted Christian priests. During the periodof remand, the patient displayed periods of nocturnal anxiety, withdrawal, depersonalisation and apparent response to hallucinations. Routine physical examination and blood chemistry, haematology and endocrinology were normal. The patient was apyretic, although complained of being hot. Blood and urine screens for illicit drugs were negative. EEG and computerised tomography scans were normal. Family relationships seemed comfortable and supportive. We were disturbed by a telephone call from the prison chaplain who described seeing the ghost possess the patient in prison, seeing a descending cloud and an impression of a face alarmingly like a description of the dead woman given to us by the patient, of which the chaplain denied prior knowledge. Similar reports came from frightened cellmates. He and our hospital chaplain concurred on genuine possession. This is an acceptable belief within the context of pastoral counselling (Isaacs, 1987). Western medical belief systems led us to a differential diagnosis of dissociative state or paranoid schizophrenia. However, we were conscious that the beliefs of at least four priests from three different religions cast doubt on the delusional nature of the phenomena. Exorcism having failed, we prescribed trifluoperazine (4mg daily) producing apparent remission. Following return to remand prison, he was commenced on a depot neuroleptic, zuclopenthixol decanoate, remaining in remission 12 weeks later following hospital transfer.