Can certain diseases cause paranoia similar to that seen in individuals with paranoid schizophrenia, even if they do not have the disorder?
Last Updated: 30.06.2025 10:08

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