How easy is it to switch? I've been advised to lower my daily dose from 9 units of Lantus in the morning plus 6 units Of Lantus in the evening to 13 units of Tresiba daily. Any experience in doing this sort of switch? How easy is it to adjust the dose of Tresiba? I'd be interested in anyone's opinion. I was told that it needs about 3 days for the levels to stabilise. I have to make a decision soon as I will run out of Lantus in about 10 days and don't want to order another 5 cartridges of Lantus. It's making me nervous!