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 12:22

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