She was taking prednisone 60 mg/d for a long time, now reduced to 10 mg/d. She has nausea, malaise, weakness. 🧐Can this be adrenal insufficiency

She was taking prednisone 60 mg/d for a long time, now reduced to 10 mg/d. She has nausea, malaise, weakness. 🧐Can this be adrenal insufficiency