However, the symptoms you write to us would lead me to advise you to make an appointment with his doctor just to make sure that he has not had some small stroke or something like that, and even more important, to have the doctor send you to a lab so you can
compare the results of his
glucose meter with one in the lab or with lab results. It is possible that his meter is not accurate right now for some reason, and it may need to be either calibrated or replaced.
One more suggestion...