Adrenal Insufficiency and Steroid Sick-Day Rules in Duchenne
Long-term steroids in Duchenne can suppress the adrenal glands. What adrenal crisis is, the sick-day rules and stress dosing that prevent it, and when to act fast.
Adrenal insufficiency is a state in which the body cannot make enough of its own stress hormone, cortisol, and it is an important and sometimes overlooked risk for children with Duchenne muscular dystrophy who take corticosteroids long term. Daily steroids such as prednisone, prednisolone, or deflazacort are a mainstay of Duchenne care, but over months and years they can suppress the adrenal glands. When the body then faces a major stress, such as a serious infection, injury, or surgery, it may not be able to respond, and that can become a medical emergency.
This post explains the risk in plain terms. The specific plan, including any medication and doses, must come from the care team.
Why steroids cause this risk
The adrenal glands normally produce cortisol, including extra amounts during illness or injury. When a person takes corticosteroids every day, the body senses there is already enough and gradually reduces its own production. This is called adrenal suppression, and it is a recognised effect of long-term steroid use in Duchenne. (Birnkrant et al., DMD Care Considerations Part 1 (endocrine), Lancet Neurology 2018)
The suppressed glands cannot quickly ramp up cortisol when it is suddenly needed. The result is a gap between what the body needs under stress and what it can supply.
What adrenal crisis looks like
Adrenal crisis is the dangerous end of this problem. Warning signs can include severe weakness, vomiting, diarrhoea, abdominal pain, drowsiness or confusion, and in severe cases collapse. These often appear during another illness, which can make them easy to miss.
Because the signs overlap with ordinary sickness, families of children on long-term steroids are usually taught to treat them seriously and act early rather than wait.
Sick-day rules and stress dosing
The standard way to prevent adrenal crisis is to give extra steroid during periods of significant stress, often called stress dosing or sick-day dosing. Emergency management, including stress dosing, is part of recognised Duchenne care guidance. (Birnkrant et al., DMD Care Considerations Part 3 (emergency management), Lancet Neurology 2018)
The details, including which situations need extra steroid and how much, are set by the care team for each child. The key point for families is to have that plan in advance, in writing, rather than working it out during an emergency. For background, see managing illness days at home in DMD.
When swallowing is not possible
If a child is vomiting or cannot keep medication down, oral steroid will not be absorbed reliably. In that situation many care teams provide an emergency injectable steroid, usually hydrocortisone, and train caregivers in when and how to use it.
Having the emergency medication, knowing the plan, and knowing the local emergency number turns a frightening moment into a managed one. For background, see emergency preparedness for DMD families.
Surgery and procedures
Planned procedures are a predictable stress, so adrenal cover is part of preparing for any operation or sedation. The anaesthetic and surgical teams should know the child is on long-term steroids well in advance. For background, see preparing for surgery in DMD and anesthesia safety in DMD.
Never stop steroids suddenly
A related rule is that long-term corticosteroids should not be stopped abruptly, because the suppressed adrenal glands cannot immediately take over. Any change to steroid dosing is planned and supervised by the care team. For background on the medicines themselves, see corticosteroids in DMD.
What is still uncertain
The exact thresholds for stress dosing, the best emergency protocols, and how to balance adrenal protection against the side effects of extra steroid continue to be refined. What is consistent across guidance is that families of children on long-term steroids need a clear, written sick-day and emergency plan, agreed with the care team, before it is needed.
For related reading, see corticosteroids in DMD, managing illness days at home in DMD, emergency preparedness for DMD families, preparing for surgery in DMD, and the reported piece When Time Is Stealing Your Child.
Disclaimer: This post is informational and does not constitute medical advice. Decisions about diagnosis or treatment must be made with a qualified care team.