In any patient with a suspected intracranial hemorrhage, what is the most important immediate step?

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In suspected intracranial hemorrhage, the immediate focus is rapid stabilization and obtaining urgent diagnostic imaging to confirm the bleed and guide treatment. Corticosteroids don’t improve outcomes in intracerebral hemorrhage and can cause harm, so they are not the best first move. The key step is emergent non-contrast CT of the head to identify the presence, location, and size of the hemorrhage, which then determines next actions like blood pressure management, neurosurgical consultation, or reversal of anticoagulation if the patient is anticoagulated. Lumbar puncture is dangerous in this context due to the risk of herniation, and prophylactic anticonvulsants are not routinely used unless a seizure has occurred. If anticoagulation is involved, reversing it promptly is crucial to limit hematoma expansion, but imaging and stabilization come first to precisely guide management.