How can alcohol react with someone with hyperinsulinism related hypoglycemia?

Metabolic swings: Alcohol can drive metabolic swings that cause your body to over produce insulin, which will then cause low blood sugars a few hours later. Decrease or stop alcohol, eat smaller more frequent meals, cut out high fat, fast carbohydrates. Okay to check in with your doc for a glucose tolerance test and nutrition consult. Be well.

Alcohol can: Cause hypoglycemia all by itself if you drink and don't eat for an extended period of time. Contrary to your beliefs, someone with hyperinsulinism does not develop hypoglycemia -- they only have the symptoms due to a drop in sugar from elevated levels back to normal. Also, a glucose tolerance test is not and never will be a diagnostic test for hypoglycemia.