My dad has type 2 diabetes. He recently forgot to take his
medication for one day, and later that night he felt sick, with
vomiting and a slight fever. He was fine after a little rest,
but could this have been a reaction to missing his medicine? If
it happens again, what should he (we) do?  — Amanda, Trinidad  I
understand your concern, but this is a difficult question to
answer without knowing details specific to your father's case,
so I'll give you a general answer. The most likely immediate
consequence of missing medicines for diabetes is a high glucose
(sugar) level. If the level is very high, it causes frequent and
copious urination, thirst, and hunger. Vomiting, dehydration,
weakness, and confusion can also be caused by high glucose
levels. If the glucose level has been high for a while, the
individual might experience weight loss.  It is possible that
your father's glucose was on the high side for several days
before he missed that one day's medicine. Therefore, it is
important to make sure that his bl