Well it's hard to say if the 3 hours works or not as my Blood sugars have been randomly horrible for the last week so very difficult to gauge what's happening :crazy: and no, there seems to be no rhyme or reason for the higher blood sugars. When do I permanently change the basal rates is the question, as using a temporary basal for now. I have been doing corrections based on 3 hrs active insulin time and not a hypo in site but, as I say, that maybe due to the increased insulin I'm needing at the moment.