Quick answer
Hypopituitarism means your pituitary gland does not make enough of one or more hormones, so you replace them with medicines. The one that matters most in an emergency is cortisol. The Australian Pituitary Foundation says “Wearing a medical alert bracelet or tag and carrying instructions for emergency steroid treatment is essential. Low cortisol levels can be a life-threatening emergency.” If you also take desmopressin, your sodium needs watching when you are unwell. A hypopituitarism medical ID carries both.
Hypopituitarism is rarely a single problem. One person may replace cortisol, thyroid hormone, sex hormones and growth hormone, and take desmopressin as well — each at its own time of day, each with its own rules when they are sick. That complexity is manageable at home with a plan from your endocrinologist. It is very hard to explain to a stranger when you have been in an accident or are vomiting and confused.
What is hypopituitarism?
Your pituitary gland is a pea-sized gland at the base of the brain. healthdirect calls it the body’s “master gland” because it tells other glands — including the thyroid, the adrenal glands and the ovaries or testes — what to do. Hypopituitarism is when the gland does not make enough of one or more of its hormones, which affects every gland that depends on them.
According to the Australian Pituitary Foundation’s hypopituitarism fact sheet, about 11,600 Australians live with hypopituitarism and around 1,070 are diagnosed each year.
What causes it
The Foundation lists tumours in or near the pituitary, surgery to remove a pituitary tumour, radiotherapy and conditions present from birth as the main causes. Less common causes include head or brain injury, severe bleeding in the brain, severe blood loss during childbirth (Sheehan’s syndrome), rare diseases or infections such as meningitis, inflammation of the pituitary, and certain medications such as long-term opioids.
Hypopituitarism symptoms
Signs usually develop gradually and can be overlooked for months or years, and having several hormones affected can mask the signs of the first. Low adrenocorticotrophic hormone (ACTH), which drives cortisol, can cause a pale appearance, low blood pressure, dizziness, tiredness, weight loss, stomach pain and low tolerance of stress.
The medicines that replace each hormone
| Missing hormone | Usual replacement (Australian Pituitary Foundation) |
|---|---|
| Adrenocorticotrophic hormone (ACTH) | Hydrocortisone, cortisone acetate or prednisolone tablets to replace cortisol |
| Thyroid-stimulating hormone | Levothyroxine tablets |
| Antidiuretic hormone (vasopressin) | Desmopressin tablets or melt-wafers |
| Growth hormone | Growth hormone injections |
| Follicle-stimulating and luteinising hormones | Oestrogen and progesterone, or testosterone; gonadotropins for fertility |
The Foundation notes that pituitary hormones interact with each other and that finding the right regime can take up to two years. Every medicine, dose and time belongs on your record.
Hypopituitarism and cortisol: the emergency risk
Cortisol helps the body respond to physical stress, keeps blood pressure up and keeps blood sugar stable. A healthy body makes more of it when you are ill or injured. If you rely on tablets, it cannot. The Foundation’s cortisol replacement therapy guidance explains:
- Higher doses are taken in the morning to match the body’s natural rhythm.
- The dose needs adjusting when you are sick, or under physical or psychological stress.
- Your endocrinologist will give you written instructions, including a sick day management plan.
- After a serious accident or medical emergency, a hydrocortisone injection may be needed.
Vomiting or diarrhoea on cortisol replacement
The Foundation warns that if you are vomiting or have diarrhoea, your tablets will not be absorbed properly. Seek urgent medical attention — you may need a cortisone injection. Follow the emergency plan your endocrinologist has given you, and if someone is seriously unwell or collapses, call Triple Zero (000).
This is the same danger faced by people with primary adrenal insufficiency; our Addison’s disease guide covers adrenal crisis in more detail.
Desmopressin and low sodium: arginine vasopressin deficiency
If your pituitary does not release enough vasopressin (also called antidiuretic hormone), your kidneys lose large volumes of water. The Foundation’s AVP-D fact sheet calls this arginine vasopressin deficiency (AVP-D), previously known as diabetes insipidus. Healthy adults pass one to two litres of urine a day; a person with severe AVP-D who drinks a lot can pass up to 19 litres.
It is treated with desmopressin. The fact sheet warns that taking too much, too often, can cause hyponatraemia (low sodium), with symptoms such as lethargy, headaches and confusion. During illnesses such as fever, vomiting and diarrhoea, people with AVP-D can easily develop problems with their medication and sodium level, and some need to get to hospital sooner than someone without the condition. A sick day plan from your specialist is vital.
A rare form, adipsic AVP-D, removes the sense of thirst. People with it usually have a prescribed daily fluid intake and weigh themselves regularly — numbers an emergency team would need.
Who reads a hypopituitarism medical ID
ANZCOR Guideline 2 includes checking for “physical (eg. alert jewellery) or electronic alert devices (eg. smartphone application) that may be relevant to assessment or management”. For you that means the paramedic after a car accident, the emergency doctor seeing you with gastro, and the anaesthetist before surgery — one of the times the Foundation says doses may need adjusting.
What a hypopituitarism medical ID should say
On the band
- HYPOPITUITARISM — STEROID DEPENDENT
- DESMOPRESSIN, if you take it
- Your membership number, so the full record can be read
In the profile
- Your diagnosis and its cause, and which hormones are affected.
- Every replacement medicine with dose and time.
- Your sick day plan and emergency steroid instructions, as written by your endocrinologist.
- Whether you carry an emergency hydrocortisone injection kit, and where.
- For AVP-D: your desmopressin regime, and any prescribed fluid intake or target weight.
- Your endocrinologist, GP and emergency contacts.
“Wearing a medical alert bracelet or tag … is essential.” — Australian Pituitary Foundation
A MedibandPlus profile holds your hormone replacement list, sick day plan, emergency steroid instructions and endocrinologist behind a membership number on a band you wear. No app, no login, from $19 a year.
Set up your profilePart of the Mediband family. Designed in Australia since 2004.
Keeping it current
The Foundation lists illness, pregnancy and breastfeeding, surgery, stress, trauma and weight changes as times your medicines may need adjusting. Update your profile whenever a dose changes, and re-read your sick day plan before travel or an operation. If your hypopituitarism followed a head injury, our guide to acquired brain injury covers the other things worth recording.
FAQs
What is hypopituitarism?
It is when the pituitary gland does not make enough of one or more of its hormones. Because the pituitary controls other glands, such as the thyroid and adrenal glands, those are affected too. About 11,600 Australians live with it, according to the Australian Pituitary Foundation.
What causes hypopituitarism?
The Australian Pituitary Foundation lists pituitary tumours, surgery, radiotherapy and conditions present from birth as the main causes, and head or brain injury, bleeding in the brain, severe blood loss in childbirth, some infections and some medications as less common causes.
Why do people with hypopituitarism need a medical alert ID?
Because many rely on cortisol replacement and cannot make extra cortisol when ill or injured. The Australian Pituitary Foundation says wearing a medical alert bracelet or tag and carrying instructions for emergency steroid treatment is essential, as low cortisol can be a life-threatening emergency.
What should I do if I am vomiting on hydrocortisone?
The Australian Pituitary Foundation advises seeking urgent medical attention, because your tablets will not be absorbed and you may need a cortisone injection. Follow your endocrinologist’s sick day plan, and call 000 if someone is seriously unwell.
What is arginine vasopressin deficiency?
AVP-D, previously called diabetes insipidus, is when the body cannot make enough antidiuretic hormone, causing large volumes of urine and constant thirst. It is treated with desmopressin.
Can desmopressin cause low sodium?
Yes. The Australian Pituitary Foundation says taking too much desmopressin too often can cause hyponatraemia, with symptoms such as lethargy, headaches and confusion, and that illness can disturb sodium levels in people with AVP-D.
What should a hypopituitarism medical ID say?
On the band: “hypopituitarism – steroid dependent”, desmopressin if you take it, and a number that opens your record. In the record: diagnosis, every replacement medicine, your sick day plan and emergency steroid instructions, any injection kit, AVP-D details and your endocrinologist.
Sources
- Australian Pituitary Foundation — Hypopituitarism fact sheet (2023) — causes, prevalence, medicines and emergency steroid advice.
- Australian Pituitary Foundation — Cortisol replacement therapy — sick day plan and emergency injection.
- Australian Pituitary Foundation — AVP-D fact sheet (2023) — desmopressin, low sodium and sick days.
- healthdirect — Pituitary gland — (last reviewed December 2024) what the pituitary does.
- ANZCOR Guideline 2 — Managing an Emergency — checking for alert jewellery and devices.
Disclaimer: This article is general information about recording hypopituitarism for emergencies, not medical advice. Your hormone doses, sick day plan and emergency steroid instructions come from your own endocrinologist; never change them without their advice. In an emergency, always call Triple Zero (000). For non-urgent health advice, call healthdirect on 1800 022 222 (NURSE-ON-CALL 1300 60 60 24 in Victoria, 13 HEALTH 13 43 25 84 in Queensland).
Related guides
