Can certain diseases cause paranoia similar to that seen in individuals with paranoid schizophrenia, even if they do not have the disorder?
Last Updated: 25.06.2025 06:27

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