Can certain diseases cause paranoia similar to that seen in individuals with paranoid schizophrenia, even if they do not have the disorder?
Last Updated: 27.06.2025 07:15

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