 [ Symptoms ] why does a1c jump up 6 2 11 4 over the last 2 years my a1c has been 7 8  7 4  6 4  6 2 then this past check up it jumped to 11 4 i have never had one that high i have not changed my diet  i have actually shed about 10 more pounds i do not understand what happened [ Disease ] dm refers to one of the ingredients on the cough medicine it stands for dextromethorphan which is a cough suppressant often used to quiet a dry annoying cough