They differ in evidence, side-effect patterns, dosing and coverage. Choose with the prescriber using the child's function, growth, behavior, bone risk, comorbidities and family priorities—not another family's result.
What this means in real life
Prednisone/prednisolone and deflazacort are glucocorticoids with substantial DMD experience. Vamorolone is a newer dissociative corticosteroid approved in the United States for DMD in patients age 2 years and older. All aim to preserve function, but they are not interchangeable milligram-for-milligram and should never be converted using an informal online calculation.
Prednisone is widely available and inexpensive, but appetite, weight, behavior, growth, bone and Cushingoid effects can be difficult. Deflazacort may have a different balance of weight and growth effects, yet cataract and other steroid risks remain and coverage can differ. Vamorolone was developed to retain anti-inflammatory benefit with a different adverse-effect profile; it still has important warnings, interactions and adrenal-suppression considerations. No option is side-effect free.
The best comparison is individualized: current function, age, growth, weight trajectory, behavior, bone history, blood pressure, glucose risk, eye history, other medicines, daily schedule and insurance. If changing drugs, the prescriber must plan equivalent exposure and adrenal safety.
A practical checklist
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Review the current prescribing information for each realistic option.
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Compare side effects that matter most for this person rather than a single headline claim.
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Check drug interactions, dosing frequency and coverage before switching.
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Use clinician-directed conversion and taper instructions.
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Track the same functional and side-effect measures before and after a change.
Questions to bring with you
Use these at the clinic, school meeting, equipment evaluation, program interview or benefits call. Write down the answers and who owns the next step.
- What evidence supports this choice for this age and stage?
- Which side effects are less likely, and which risks remain?
- How will the dose be calculated and adjusted with growth?
- What monitoring schedule is required?
- If this choice is not tolerated or covered, what is Plan B?
Important safety note
This topic can involve serious or immediate risk. Do not start, stop or change treatment from an online answer. Contact the Duchenne care team; use emergency services for urgent symptoms or danger.
Sources used for this guide
Direct links are included so families can check the original guidance and bring it to qualified professionals.
Content review: July 18, 2026. Medical labels, trials, benefits and programs can change after publication.
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