Can certain diseases cause paranoia similar to that seen in individuals with paranoid schizophrenia, even if they do not have the disorder?
Last Updated: 26.06.2025 16:59

Bipolar disorder
Stress
Seizures
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Alcohol
Sleep disorders
Brain Tumors
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Parkinson's disease
PTSD
Affective disorders
Charles Bonnet syndrome
Head injury
Narcolepsy
Grief (yes, sadly)
Mental disorder
Delirium tremens
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Withdrawal from benzodiazepines
Fever
Migraines
Alzheimer's disease,
Infection
⁉️sources from my experiences and internet research ⁉️
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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).
Dementia with Lewy bodies
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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Hallucinogen use
Alcohol withdrawal
Pharmaceutical drug (abuse or side effects)