Can certain diseases cause paranoia similar to that seen in individuals with paranoid schizophrenia, even if they do not have the disorder?
Last Updated: 02.07.2025 00:20

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