What is the definition or description of: cortone allergy?

Cortone allergy: Cortone (Cortisone Acetate) is a glucocorticoid adrenocortical steroids. This brand is no longer available in the US. An allergy occurs when your body’s immune system creates antibodies to a foreign substance causing a reaction that can be mild to severe. For potential adverse effects see: http://www.rxlist.com/cortone-drug.htm