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 01:01

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