As far as cough drops and cough medicine here is what I have noticed. Most of the brands marketed for diabetics don't work or taste so god-awful you were happier being sick from the cold. I tend to take regular cough drops (halls or ricola) and good ol' nyquil. Both will raise my BS slightly. However, if used properly over the course of the day it is very negligible so I usually ignore it (maybe it will raise me five the whole day). On the other hand, the days I am truly sick, I am running high anyways and giving myself extra insulin. On those days I figure the medicine is picked up with the temp rate I am running. It is nearly impossible for me to remain steady on sick days without medicine so I don't worry about it too much, figuring it is better that I get healthier than worry too much about BS.