Somogyi Effect and the Dawn Phenomenon

Diabetes is an illness that the patient must live withketones causes the pH of the system to drop. If the
the rest of their lives. The key to living with diabetespH of the body drops below 7.35, a state of Diabetic
successfully is tight glycemic control, or controllingKetoacidosis occurs, which can cause a diabetic coma.
blood sugar levels. Blood sugar levels can vary fromThis rebound hyperglycemia known to occur in
time to time depending on several factors such asresponse to hypoglycemia in the early hours of the
stress levels, amount of food consumed, type ofmorning between two and four A.M., is called, the
food consumed, amount of insulin used or insufficientSomogyi Effect. A good way of detecting the
insulin coverage and the time of day.Somogyi Effect is to have the diabetic test their
The human being responds to Circadian Rhythms.blood sugar during those hours. If their blood sugar is
These are regular changes in mental and physicallow, then they can correct it by eating a snack,
characteristics that occur in the course of a day. Thisbefore going back to sleep.
term may be more familiar as the, "biological clock". AThe Somogyi Effect can occur at anytime during the
good example is that of someone working midnightsday, but is most often equated with the early hours
for the first time. They find it very difficult to sleepof the morning. Symptoms include headache,
during the day and stay awake all through the night.nightmares and night sweats. The treatment of this
It is as if their body has a mind of its own. In fact,phenomenon usually involves lowering insulin dosage
there is some truth to that statement. Bearsprior to sleep.
hibernate because of their biological clock.Another disorder similar to the Somogyi Effect is
Circadian Rhythms combined with the aboveknown as the Dawn Phenomenon. Although most
mentioned factors can produce wide fluctuations indiabetics are affected by this disorder, it seems to
the blood glucose levels of diabetics while they sleep.occur more often in pubescent adolescents.
A diabetic's blood glucose level may be at 135 mg/dLAdolescents' blood sugar is affected adversely by
prior to bedtime and at two A.M. may drop to 40 mgtheir body releasing counter regulatory hormones.
dL, causing a severe state of hypoglycemia. TheThese counter regulatory hormones produce
body responds to such a drop by producing glucoseprecipitously high blood sugar levels. It is thought that
from alternate sources, since there is no source ofthe growth hormone has some impact in relation to
ingested food. The only sources of glucose comethe production of counter regulatory hormones.
from the liver via gluconeogenesis, lipolysis (breakUsually upon waking, the diabetic's blood sugar is
down of lipids) and glycogenolysis.excessively high. Correction of the Dawn
The body's hormones stimulate this cascadingPhenomenon requires an increase in insulin coverage
response to dangerously low blood sugar. The resultsprior to bedtime.
of such a response, is that of high blood sugar. ThisIt is easy to see how both of these disorders can be
rebound hyperglycemia can in turn causes ketosis.mistakenly diagnosed for the other. That is why it is
Ketosis occurs because the body is fooled intoimportant for the diabetic to test their own sugar on
thinking that there is not enough glucose, since theseveral early morning intervals and present the
cells are starved, and the glucose is floating in theresults to their doctor. Correct determination of
blood stream instead of being utilized within the cells.which disorder is occurring is crucial to continued
The body then begins to break down proteins whichhealth of the diabetic.
in turn cause the release of ketones. The release of