Hello, i am diabetic with type 1 for 28 years now and from my experience its impossible to live with just the Lantus. As you probably know thats just long and slow acting insulin to keep the sugar levels normal as much as possible but with no quick acting insulin thats mean no food for the poor man. How is it possible nurses and doctors to keep your father with sugar levels 20+??? It's amazingly stupid and dangerous. If it was me there i will seek advise from another hospital or another diabetic team. Please be aware of high sugar levels as you probably know its killing him slowly. Low sugar or the hypo is even more dangerous but they cant keep him only on Lantus. Take care. Hope you can understand what i was trying to say. I do appologise if my english is here and there incorrect. X