Medication Reconciliation and a Look-Alike Insulin Error
Mr. Adeyemi, 54, is admitted with a diabetic foot infection. His home regimen is insulin glargine 40 units subcutaneously at bedtime and insulin lispro 8 units with meals. On admission the resident writes "insulin 40 units SC at bedtime" and "insulin 8 units SC with meals" without specifying type. The night nurse, covering 9 patients, administers 40 units of regular insulin at 22:00. At 23:30 Mr. Adeyemi is diaphoretic, confused, and tremulous. Point-of-care glucose is 42 mg/dL. He is awake enough to swallow.
1. What is your immediate management, and what is the physiologic reasoning?
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Treat as severe hypoglycemia with neuroglycopenic symptoms. Because he can swallow and protect his airway, give 15–20 g fast-acting oral carbohydrate (glucose gel or juice), recheck glucose in 15 minutes, and repeat until above 70 mg/dL, then provide a longer-acting carbohydrate and protein snack.
If he cannot swallow or deteriorates, give glucagon 1 mg IM or IV dextrose per protocol. Regular insulin peaks later than lispro, so this is a prolonged hypoglycemia risk; continue hourly glucose checks and consider a dextrose infusion.
Rationale: the error was a wrong insulin type, not a wrong dose; regular insulin's longer duration means monitoring must extend well beyond the first correction.
2. What system failures does this event reveal, and what immediate safeguards do you put in place?
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Failures: (1) incomplete prescribing without insulin type; (2) no independent double-check for high-alert insulin; (3) look-alike naming contributing to mis-selection; (4) staffing ratio reducing verification.
Immediate safeguards: obtain a corrected order specifying glargine and lispro; place the patient on a hypoglycemia protocol with scheduled checks; require independent double-check of all insulin doses; separate storage and use distinctive labeling; notify the prescriber and pharmacy; and file an incident report.
Rationale: high-alert medications require independent verification because a single error has high harm potential.
3. How do you disclose this to the patient and family?
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Use open disclosure: explain what happened, the insulin error, the symptoms, the treatment, and the current status, in plain language. Apologize for the harm without speculating about blame, express what is being done to prevent recurrence, and answer questions. Document the conversation and the patient's response.
Rationale: transparency is an ethical and often legal obligation and supports trust; speculation about fault or concealment undermines both.