My father fasting sugar level is 240 around and after food is above 400. Hba1c is 300. His weight is 55 kg, height is 5 fit 2 inch, current medicine taken zoryl m1 one before breakfast and one before dinner. He is doing 15 min yoga in morning and not take sugar in any form. Bypass surgery happened in Jan 2017. Everything is normal but sugar not. We stopped insulin because we think it's dangerous. please suggest some good medicine.