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The dawn phenomenon and the Somogyi effect
cause high blood sugar levels, especially in the morning before breakfast, in
The dawn phenomenon occurs
The Somogyi effect can occur when
a person takes long-acting insulin for diabetes. If the blood sugar level drops
too low in the early morning hours, hormones (such as growth hormone, cortisol,
and catecholamines) are released. These help reverse the low blood sugar level
but may lead to blood sugar levels that are higher than normal in the morning.
An example of the Somogyi effect is:
effect can occur any time you or your child has extra insulin in the body. To
sort out whether an early morning high blood sugar level is caused by the dawn
phenomenon or Somogyi effect, check blood sugar levels around 2 a.m. to 3 a.m.
for several nights.
December 7, 2010
John Pope, MD - Pediatrics & Stephen LaFranchi, MD - Pediatrics, Pediatric Endocrinology
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