Since non-medical mental health practitioners are not trained to exclude medical causes of psychosis, people experiencing psychosis should be referred to an emergency department or hospital. Delirium should be ruled out, which can be distinguished by visual hallucinations, acute onset and fluctuating level of consciousness, indicating other underlying factors which includes medical illnesses. Excluding medical illnesses associated with psychosis is performed by using blood tests to measure:

Thyroid-stimulating hormone to exclude hypo- or hyperthyroidism,
Basic electrolytes and serum calcium to rule out a metabolic disturbance,
Full blood count including ESR to rule out a systemic infection or chronic disease, and
Serology to exclude syphilis or HIV infection.Other investigations which may be performed include:

EEG to exclude epilepsy, and an
MRI or CT scan of the head to exclude brain lesions.Blood tests are not usually repeated for relapse in people with an established diagnosis of schizoaffective disorder, unless there is a specific medical indication. These may include serum BSL if olanzapine has previously been prescribed, thyroid function if lithium has previously been taken to rule out hypothyroidism, liver function tests if chlorpromazine has been prescribed, CPK levels to exclude neuroleptic malignant syndrome, and a urinalysis and serum toxicology screening if substance use is suspected. Assessment and treatment may be done on an outpatient basis; admission to an inpatient facility is considered if there is a risk to self or others. Because psychosis may be precipitated or exacerbated by common classes of psychiatric medications, such as antidepressants, ADHD stimulant medications, and sleep medications, prescribed medication-induced psychosis should be ruled out, particularly for first-episode psychosis.
Neonatal hepatitis refers to many forms of liver dysfunction that affects fetuses and neonates. It is most often caused by viruses or metabolic diseases, and many cases are of an unknown cause. Signs and symptoms
The infant with neonatal hepatitis usually has jaundice that appears at one to two months of age, is not gaining weight and growing normally, and has an enlarged liver and spleen. Infants with this condition are usually jaundiced. Jaundice that is caused by neonatal hepatitis is not the same as physiologic neonatal jaundice. In contrast with physiologic neonatal jaundice, infants with neonatal hepatitis present with dark urine. Infants may also present with delayed growth. Causes
The causes of neonatal hepatitis are many. Viruses that have been identified include cytomegalovirus, rubella virus, hepatitis A and B viruses, herpes simplex viruses, coxsackievirus, echovirus, and paramyxovirus. Metabolic and immune disorders can also cause neonatal hepatitis. Giant cell transformation throughout the parenchyma is common. Diagnosis
Differential diagnosis
Conditions that can present similarly include galactosaemia, hereditary fructose intolerance, cystic fibrosis, and biliary atresia. See also
Neonatal jaundice

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