I switched to Levemir 2 weeks ago. My BMs were up and down for a week straight, then woke up feeling very unwell. Checked my sugars which were 12, my ketones were 3, took insulin and tried to eat, couldnt keep anything down, ended up being sent to hospital after speaking to a DSN. I was home by 5pm, no infection found or any reason why it might have happened. Upped my levemir that night, next moring woke up with ketones again, managed to get rid of them myself. Upped my levemir again... next morning ketones again.... same deal, still had a lantus pen in the fridge, switched back to that and havent had a problem since. I have an appointment with my DSN tomorrow. Will be telling her I have no intention of trying Levemir again! Guess not all insulins work for everyone.