*I commenced on Lantus five weeks ago. Since the very next day after I commenced, I have got a headache every morning about an hour after breakfast. I have never in my life had this happen before. It is bad enough to need pain killers -which I don't like having to take each day. I mentioned it to my doctor and he thought it was not to do with the insulin but maybe a stress reaction. But why at exactly the same time each day? And why when I have been stressed all my life, but never had this headache before? Always on my right side. Weird and painful!