Can certain diseases cause paranoia similar to that seen in individuals with paranoid schizophrenia, even if they do not have the disorder?
Last Updated: 29.06.2025 21:31

Seizures
Stress
Mental disorder
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Grief (yes, sadly)
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Parkinson's disease
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Alcohol withdrawal
Affective disorders
Alcohol
Bipolar disorder
Withdrawal from benzodiazepines
Alzheimer's disease,
Hallucinogen use
Delirium tremens
Sleep disorders
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Fever
Charles Bonnet syndrome
Dementia with Lewy bodies
Brain Tumors
Migraines
Head injury
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Some of those things on the list are very very rare cases but I just wanted to cover everything (or almost everything).
Dementia and drug use cause paranoia. That is very common. Some of other things that can include delusions and/or hallucination can be:
Pharmaceutical drug (abuse or side effects)
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Infection
Narcolepsy
PTSD