Diagnosis of yew poisoning is typically based on the clinical symptoms and a history of exposure to the tree. There are no specific laboratory tests to confirm yew poisoning, but blood tests may show metabolic acidosis or elevated serum potassium. Treatment is mainly supportive, focusing on stabilizing the cardiovascular and respiratory systems. Activated charcoal may be administered to reduce absorption if the ingestion is recent. In severe cases, advanced cardiac life support may be necessary.
