An 81-year-old woman presented with a 4-week history of multiple tense bullae initially on the hands and feet, which subsequently expanded to the trunk and face. She had a history of hypertension and type-2 diabetes mellitus.

Enalapril was commenced to control hypertension. Her histopathology and direct immunofluorescence results were compatible with lichen planus pemphigoides (LPP). Circulating anti-basement antibodies BP180 were also positive.

How should this patient be treated?