Immediate management in hospital

1. ABC assessment and monitoring
   • Airway, breathing, circulation, mental status
   • Repeat BP manually, check pulse, oxygen saturation, ECG
   • Establish IV access and monitor glucose every 15 minutes.
2. Treat hypoglycemia immediately
   • If alert, cooperative, and can swallow safely: give 15 g fast-acting glucose orally, such as glucose tablets/gel or glucose-containing drink.
   • Recheck capillary blood glucose in 15 minutes and repeat if still below 70 mg/dL (3.9 mmol/L).
   • If swallowing is unsafe, consciousness falls, seizures occur, or oral treatment fails: give IV dextrose or glucagon per hospital protocol.
   • Once corrected, give a longer-acting carbohydrate/meal if appropriate and investigate why it occurred. The ADA 2026 guidance recommends glucose as first-line treatment in a conscious person with glucose below 70 mg/dL, with reassessment after 15 minutes.
3. Address hypotension
   • Lay the patient supine, elevate legs if no contraindication.
   • Assess for dehydration, vomiting/diarrhea, bleeding, sepsis, cardiac ischemia/arrhythmia, and drug effect.
   • Give IV fluids if clinically indicated, with caution in heart failure or kidney disease.
   • Persistent hypotension, chest pain, dyspnea, fever, altered sensorium, or shock requires urgent senior/emergency management.

Likely medication-related causes

• Insulin or sulfonylureas such as glimepiride, gliclazide, or glibenclamide can cause hypoglycemia, especially after missed meals, vomiting, reduced intake, excess dose, exercise, alcohol use, or renal impairment.
• Antihypertensives, diuretics, dehydration, or diabetic autonomic neuropathy can contribute to low BP.
• Beta-blockers may mask warning symptoms of hypoglycemia such as palpitations and tremor.
  Tintinalli's Emergency Medicine, treatment of hypoglycemia section.

Important next steps

• Do not simply discharge after one normal glucose reading, particularly if the patient took a sulfonylurea or long-acting insulin. Recurrent hypoglycemia can occur and may need observation.
• Review all medication names, doses, timing of the last dose, meals, alcohol intake, renal function, electrolytes, CBC, ECG, and infection screen as indicated.
• Temporarily withhold or adjust diabetes and BP medicines only under the treating clinician’s direction after identifying the cause.

• D10W: preferred lower-concentration IV option. A common adult starting dose is 125-150 mL IV slowly over 3-5 minutes which gives 12.5-15 g glucose, then recheck blood glucose after 15 minutes.
• D5W: not appropriate as the initial rescue treatment because it supplies too little glucose per mL and would require a large volume. It may have a role only as a maintenance infusion in selected situations, according to the hospital protocol.
• If the patient is fully alert and swallowing safely, oral fast-acting glucose 15 g is preferred rather than IV dextrose.