Several hours before, a 28-year-old patient suddenly developed acute headache and repeated vomiting, then lost consciousness. Objectively: focal neurological symptoms were not found. Pronounced meningeal symptoms were revealed. BP- 120/80 mm Hg. According to clinical and liquorologi-cal findings the patient was diagnosed with subarachnoid haemorrhage. After administration of dehydrants the patient’s condition somewhat improved. What is the main component of further emergency care?