Wise advice rom Rick. If I am 100% honest, I try my hardest to follow the advice Rick gives above...but sometimes get it wrong, and my blood sugar does wonder up. My rule of thumb, is if it hits 16, then I have a couple of extra units, but I would emphasie, that if you do similar, be very careful! It is not a good approach at all, as occasionally, I then Yo yo between high and low if I have too much insulin...and this is not good! It is far better to get the insulin levels right in teh forst place, but if you do adjust, I would advise caution...it is better to under adjust, than over.