Can certain diseases cause paranoia similar to that seen in...

Alzheimer's disease,

Head injury

Delirium tremens

⁉️sources from my experiences and internet research ⁉️

Seizures

Alcohol withdrawal

Mental disorder

Pharmaceutical drug (abuse or side effects)

Dementia with Lewy bodies

Sleep disorders

Migraines

Withdrawal from benzodiazepines

Fever

Hallucinogen use

PTSD

Dementia and drug use cause paranoia. That is very common. Some of other things that can include delusions and/or hallucination can be:

Stress

Infection

Alcohol

Grief (yes, sadly)

Narcolepsy

Some of those things on the list are very very rare cases but I just wanted to cover everything (or almost everything).

Brain Tumors

Charles Bonnet syndrome

Parkinson's disease

Bipolar disorder

Affective disorders

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