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 06:55

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