Acute & Same-Day Care • Common Complaints
Hyperglycemia / Hypoglycemia Concerns
Hypoglycemia is immediately dangerous — correct it before anything else. Hyperglycemia decisions hinge on whether DKA or HHS is possible. This page covers the can't-miss diagnoses (severe hypoglycemia with AMS or seizure, DKA, HHS, sepsis presenting as hyperglycemia, MI presenting with hyperglycemia, adrenal crisis, insulin pump failure), red flags including glucose < 60 with symptoms or < 50 regardless, ketones, hypotension, AMS, the minimum safe first-pass workup (POC glucose, urine and serum ketones, BMP, anion gap calculation, ECG when indicated), in-office treatment of hypoglycemia (15-15 rule, IM glucagon when needed) and mild hyperglycemia, escalation criteria, documentation, and discharge education with sick-day rules and return precautions. Written for NPs, PAs, and MDs in outpatient practice.
Full clinical workflow, red flags, dosing, and documentation below. Subscribe to read the full guide.
Acute & Same-Day Care • Common Complaints
Hyperglycemia / Hypoglycemia Concerns
Why this symptom matters
Hypoglycemia is immediately dangerous; correct it before anything else. Hyperglycemia decisions hinge on whether DKA/HHS is possible.
What must I not miss first?
- Severe hypoglycemia with AMS or seizure
- DKA
- HHS
- Sepsis presenting as hyperglycemia
- MI presenting with hyperglycemia
- Adrenal crisis
- Insulin pump failure
Red flags — escalate or work up urgently
- Glucose < 60 with symptoms or < 50 regardless
- AMS, seizure, focal deficit
- Glucose > 300 with vomiting, abdominal pain, Kussmaul breathing, fruity breath
- Ketones in urine, anion-gap acidosis if available
- New polyuria/polydipsia + dehydration in older adult (HHS)
- Type 1 diabetic with insulin interruption or pump failure
- Sepsis criteria with hyperglycemia
Immediate Management — While You Work It Up
- Hypoglycemia — give 15–20 g fast-acting carbohydrates PO if patient is conscious and able to swallow safely: juice, glucose tablets, or regular soda. Give dextrose 25 g IV push if patient cannot swallow or is unconscious. Glucagon 1 mg IM if no IV access available. Recheck glucose in 15 minutes. Repeat treatment if still < 70. Do not discharge until glucose is stable > 80 on two consecutive checks.
- Hyperglycemia without DKA — IV fluids NS 1 L over 1 hour. Check BMP, fingerstick ketones, and calculate anion gap before any insulin decision. If uncomfortable managing in urgent care, stabilize with fluids and send to ED.
- DKA criteria — glucose > 250 plus ketones plus anion gap acidosis. This is an ED diagnosis. Start IV fluids immediately, call 911, and do not discharge regardless of how well the patient appears.
- HHS criteria — glucose > 600 plus altered mental status plus no significant ketosis. Call 911. Start fluids while waiting.
- Document every glucose check with time, value, and intervention given.
Minimum safe first-pass workup
- What to ask: diabetes type, regimen, last meal, last insulin/medication, recent illness/infection, vomiting, missed doses, pump status, alcohol
- What to examine: vitals, mental status, hydration, abdominal exam, respiratory pattern (Kussmaul), source of infection
- POC glucose immediately
- UA for ketones, glucose
- BMP if available — anion gap, K, bicarb
- POC ketones if available
What can usually be managed outpatient
- Hypoglycemia corrected with oral carbs, asymptomatic, glucose > 100, can eat: 15-15 rule, then complex carbs + protein, identify cause, adjust regimen
- Mild hyperglycemia (200–350) without ketones, normal mentation, no vomiting: hydrate PO, correction insulin, address cause (illness, missed dose), close follow-up
- Sick-day rules counseling for diabetics; do not stop basal insulin
When to escalate to ED / higher level of care
- Hypoglycemia from sulfonylurea (recurrence common — observe or send to ED)
- Hypoglycemia with AMS not fully recovered after correction
- Hyperglycemia with vomiting, ketones, abdominal pain, Kussmaul breathing — DKA workup
- Glucose > 600 in older adult with AMS — HHS
- Sepsis criteria, infection source needing IV abx
- Insulin pump failure in T1DM and unable to manage with injections
What to document when the diagnosis is still uncertain
- Initial glucose, repeat after treatment, mental status pre- and post-treatment
- Likely cause (missed dose, illness, sulfonylurea, etc.)
- "DKA / HHS / sepsis / sulfonylurea-induced hypoglycemia considered because… ruled out because…"
- Regimen change, sick-day instructions, follow-up timing, return precautions
Safety-net & return precautions to give
- Return or call 911 for confusion, trouble waking up, vomiting, severe weakness, fast breathing, fruity breath, or another low blood sugar episode.
- Check glucose every 2–4 hours when sick. Do NOT stop basal insulin.
- Follow up with PCP/endocrinology in 24–72 hours.
Educational guidance for clinicians. Not a substitute for clinical judgment. Always individualize to the patient and your local resources.
Evidence sources
- · ADA Standards of Care 2025
- · Endocrine Society Hypoglycemia Guidelines
Review status
Last reviewed: 2026-04
Reviewed by the MyClinicianGuide editorial team. Cadence: annual.
Educational reference for licensed clinicians (NP, PA, MD, DO). Not a substitute for clinical judgment, institutional protocols, or specialty consultation. Apply in context of the full clinical picture, patient goals, and current standards of care. See About AI guidance for AI-related limitations.
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