Sleep Disorders (Insomnia): Test and Diagnosis

2nd order laboratory parameters – depending on the results of the history, physical examination, etc.

• Small blood count
• Melatonin serum level
• Melatonin as 6-sulfatoxymelatonin – urine collected in 6-hourly periods over 24 hours.
• TSH (thyroid-stimulating hormone).
• Liver – alanine aminotransferase (ALT, GPT), aspartate aminotransferase (AST, GOT), gamma-glutamyl transferase (γ-GT, gamma-GT; GGT).