Many older people with diabetes may be exposed to potential harm because doctors are trying to keep overly tight control of their blood sugar levels, a new study argues.

Researchers found that nearly two-thirds of older diabetics who are in poor health have been placed on a diabetes management regimen that strictly controls their blood sugar, aiming at a targeted hemoglobin A1C level of less than 7 percent.

But these patients are achieving that goal through the use of medications that place them at greater risk of hypoglycemia, a reaction to overly low blood sugar that can cause abnormal heart rhythms, and dizziness or loss of consciousness, the researchers said.

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