Brain and nervous system disorders

Brain tumors

Head injury

Huntington disease

Multiple sclerosis

Seizures that affect the temporal lobe (focal seizures)

Stroke

Connective tissue disorders

Rheumatic fever

Systemic lupus erythematosus (lupus)

Infections

AIDS

Encephalitis due to certain viral infections

Influenza

Syphilis (late stage)

Hormonal disorders

High levels of thyroid hormones (hyperthyroidism)

Medications and illicit drugs

Amphetamines

Certain antidepressants (including tricyclic antidepressants and noradrenergic reuptake inhibitors [NRIs])

Corticosteroids