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PubMed This is a summary of 21 peer-reviewed journal articles Updated
Endocrinology · Isolated ACTH Deficiency

Emergency Preparedness: Preventing Adrenal Crisis

At a Glance

People with isolated ACTH deficiency need a written sick-day plan, emergency hydrocortisone, medical alert identification, and caregiver support. Vomiting or severe diarrhea can prevent oral medicine absorption, so use the emergency hydrocortisone injection and seek emergency care immediately.

Living with isolated ACTH deficiency (IAD) means your body cannot produce the extra cortisol it needs to handle physical stress. While your daily medication keeps you stable, certain events—like a stomach bug, a high fever, or a major injury—can cause your cortisol levels to drop to dangerously low levels. This state is called an adrenal crisis, and it is a life-threatening medical emergency [1][2].

Recognizing an Impending Crisis

An adrenal crisis can develop rapidly, sometimes in just a few hours. You must act immediately if you experience any of the following during an illness or after an injury:

  • Severe weakness or profound lethargy [2].
  • Nausea, vomiting, or intense abdominal pain [1].
  • Confusion, dizziness, or feeling like you might faint [3][4].
  • Low blood pressure or a rapid heart rate [5].

Because IAD usually does not affect your salt-balancing hormones, your potassium levels may remain normal even during a crisis. Do not wait for “classic” signs like high potassium to seek help [6].

Sick Day Rules: Managing Mild Illness

When you have a minor illness, your body needs more cortisol than your standard daily dose. Your endocrinologist will provide a personalized, written plan with specific fever thresholds, but standard “Sick Day Rules” generally include:

  • Double or Triple Your Dose: For a fever or an infection requiring antibiotics, you will typically be instructed to double or triple your oral hydrocortisone dose until the illness improves [7][8].
  • Stay Hydrated: Drink fluids containing electrolytes and sugar (like sports drinks) to prevent low sodium or low blood sugar [9].
  • Seek Immediate Help: If you are stress dosing and symptoms worsen, do not wait 24 hours—seek same-day emergency medical evaluation [10].

The Emergency Injection: When Oral Meds Aren’t Enough

The most dangerous trigger for an adrenal crisis is gastroenteritis (a stomach bug) because vomiting prevents your body from absorbing your life-saving tablets [11][12].

If you have persistent vomiting, cannot keep your oral medication down, or experience severe prolonged diarrhea, you must immediately use your 100 mg IM (intramuscular) hydrocortisone injection [7][13]. The injection acts as a bridge to keep you safe until you can receive medical care [14][2].

After injecting, you—or a caregiver—must call emergency services or go to the nearest emergency room immediately [15][16]. Tell responders clearly: “I have adrenal insufficiency and require hydrocortisone.”

Hospital Treatment and Advocacy

In the emergency room, you may encounter staff who are unfamiliar with IAD. You must advocate for yourself (or have a caregiver do so) using your Emergency Action Plan.

  • No Waiting: Standard medical protocol dictates that 100 mg of IV or IM hydrocortisone must be given immediately if a crisis is suspected. Doctors should not wait for the results of blood tests before starting treatment [17][18].
  • Ongoing Support: Following the initial 100 mg bolus, the standard care is typically fluid resuscitation, glucose monitoring, and an additional 200 mg of hydrocortisone over the next 24 hours, managed by clinicians [2][7].

Your Lifesaving Toolkit

Preparedness is your best defense against a crisis. You should never be without these three items:

  1. Medical Alert Identification: Wear a bracelet or necklace that clearly states “Adrenal Insufficiency - Needs Hydrocortisone” [19][20].
  2. Steroid Emergency Card: Carry a written card (often provided by endocrine societies) that lists your diagnosis and the exact emergency treatment protocol for doctors [10][16].
  3. Emergency Injection Kit: Keep an unexpired 100 mg hydrocortisone injection kit. Store it in a temperature-controlled location per the manufacturer’s guidelines—do not leave it in a car where extreme heat or freezing can destroy the medication [10][1]. Keep a backup kit accessible for travel or work.

Regularly review how to use your injection kit with your family or housemates so they can assist you if you are too weak to help yourself [10][21].

Common questions in this guide

What should I do if vomiting prevents me from taking hydrocortisone?
If you have persistent vomiting, cannot keep your hydrocortisone down, or have severe prolonged diarrhea, use your prescribed 100 mg intramuscular hydrocortisone emergency injection immediately. Then call emergency services or go to the nearest emergency department and tell responders that you have adrenal insufficiency and need hydrocortisone.
How should I adjust hydrocortisone during a fever or infection?
Follow the written sick-day plan from your endocrinologist. In general, a fever or infection that needs antibiotics may require doubling or tripling your usual oral hydrocortisone until you recover, but your exact dose and duration must be individualized. If symptoms worsen while stress dosing, seek same-day emergency evaluation.
What are the warning signs of an adrenal crisis?
Warning signs include severe weakness, vomiting, intense abdominal pain, confusion, dizziness or near-fainting, low blood pressure, and a fast heart rate. An adrenal crisis can worsen within hours, and potassium may stay normal in isolated ACTH deficiency, so do not wait for high potassium before seeking emergency help.
Should emergency clinicians wait for blood test results before giving hydrocortisone?
No. If adrenal crisis is suspected, emergency clinicians should give 100 mg of intravenous or intramuscular hydrocortisone immediately rather than waiting for blood test results. Further care commonly includes fluids, glucose checks, and additional hydrocortisone under medical supervision.
What should I carry in an adrenal emergency kit?
Keep an unexpired 100 mg hydrocortisone injection kit, a visible medical alert bracelet or necklace, and a steroid emergency card that explains your diagnosis and emergency treatment. Store the medicine as directed by the manufacturer, avoid extreme heat or freezing, keep a backup available for travel or work, and teach a trusted caregiver how to use it.
How can a caregiver help if I become too weak to treat myself?
A partner, housemate, or caregiver should know where the emergency injection kit is, how to prepare and give the injection, and how to contact emergency services. They should tell responders that you have adrenal insufficiency and require hydrocortisone, while bringing your emergency card if possible.
Do dental work or minor procedures require extra hydrocortisone?
Whether dental work or a minor procedure requires extra hydrocortisone depends on the procedure and your individual medical plan. Ask your endocrinologist for instructions in advance, and do not change or skip your dose without professional guidance.

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Questions to Ask Your Doctor

Curated prompts to bring to your next appointment.

  1. 1.Can you provide me with a written sick-day plan that specifies exactly how much I should increase my dose for a fever of 100.4°F (38°C) versus a more severe infection?
  2. 2.Will you show me and my partner/caregiver exactly how to reconstitute and inject the 100 mg hydrocortisone emergency kit?
  3. 3.What should I tell the ER staff specifically to ensure they give me IV hydrocortisone immediately without waiting for my blood test results?
  4. 4.How much extra hydrocortisone should I keep on hand for 'stress dosing' to ensure I don't run out during an illness?
  5. 5.Are there specific instructions for when I have dental work or minor procedures that might not be as stressful as major surgery?

References

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This page is for informational purposes only and does not constitute medical advice. Follow your endocrinologist’s written sick-day plan and seek urgent care for suspected adrenal crisis.