From Smithfield, Illinois, USA:
My two year old son, diagnosed with hyperinsulinism and hyperammonemia at three months of age, has been successfully using oral diazoxide. He now weighs 35 pounds and is taking 70 mg every eight hours. Since it seems he will always be on this medicine, I am wondering what the long-term effects are of using diazoxide are. Could it be damaging in anyway, physically or mentally?
Your son has a very rare condition in which the hypoglycemia is due to excessive stimulation of insulin by glutamate which is in turn due to an inborn error of the enzyme glutamate dehydrogenase. Unlike other cases of PHHI (Persistent Hyperinsulinemic Hypoglycemia of Infancy), which are due to various form of islet cell hyperplasia, diazoxide is effectively the only treatment, although calcium channel blockers and octreotide could be used if there was no response to diazoxide. Fortunately this latter drug is remarkably free of toxic effects, and the main long term danger is from hypoglycemia. In any case, your son getting only about two thirds of the maximum dose. Irrespective of the diazoxide, the underlying enzymatic defect does seem to be linked to developmental problems which your pediatrician can help detect and contain.
Last Updated: Tuesday April 06, 2010 15:09:50
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