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 05:15

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