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 09:00

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