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FAST REVISION
General Medicine
Hydrocortisone, a glucocorticoid, is administered to reduce vascular permeability and suppress the systemic inflammatory response in anaphylaxis. Its effects are not immediate but can help in preventing a biphasic reaction and prolonging symptoms.
Physiology
The primary site of absorption for calcium, iron, and vitamin B12 is the jejunum, making the answer "All of the above" correct.