Deflazacort: Uses, Dosage, Side Effects and More

Introduction: What is Deflazacort?

If you or a loved one are managing an autoimmune disease, inflammatory disorder, or a specific type of cancer, your doctor may have prescribed Deflazacort. This corticosteroid medication is primarily used to reduce inflammation and suppress the immune system.

It is similar to other corticosteroids but is known for a lower risk of certain side effects, particularly bone mineral density loss and weight gain, making it a valuable option for various conditions, including Duchenne muscular dystrophy.

Indications and Uses

FDA-Approved Indication

Deflazacort (brand name: Emflaza) is FDA-approved for the treatment of Duchenne muscular dystrophy (DMD) in patients aged 2 years and older.

DMD is a rare, inherited muscle disease characterised by progressive muscle degeneration and weakness, caused by an absence of the protein dystrophin.

Deflazacort is the only corticosteroid with a specific FDA approval for DMD.

Off-Label Use in India

In Indian clinical practice, deflazacort is widely prescribed off-label as a corticosteroid for various inflammatory and autoimmune conditions. These uses are based on clinical experience and regional prescribing patterns; they are not FDA-approved indications.

Common off-label uses include:

• Autoimmune disorders: Rheumatoid arthritis, systemic lupus erythematosus (SLE), autoimmune hepatitis
• Inflammatory conditions: Asthma, inflammatory bowel disease (IBD), nephrotic syndrome
• Allergic conditions: Severe allergic reactions, allergic rhinitis (in moderate to severe cases only)
• Dermatological conditions: Severe eczema, pemphigus, and other autoimmune skin disorders
• Organ transplant: As part of immunosuppressive regimens to prevent graft rejection
• Certain cancers: As part of treatment regimens for specific haematological malignancies, including leukaemia and lymphoma

Deflazacort is not recommended for mild allergies or conditions that can be managed with non-steroidal anti-inflammatory drugs. It should be used only when the clinical situation warrants corticosteroid therapy, as determined by the prescribing physician.

How It Works

Deflazacort works by mimicking the effects of hormones produced by the adrenal glands, particularly cortisol.

It reduces inflammation by inhibiting the release of substances in the body that cause inflammation and immune responses.

In simpler terms, it calms down the immune system and reduces swelling, redness, and pain associated with various conditions.

After oral administration, deflazacort is rapidly converted to its active metabolite, 21-desacetyldeflazacort, which is responsible for its therapeutic effects.

Dosage

DMD Dosing (FDA-Approved)

• Adults and children aged 2 years and older: 0.9 mg/kg/day, administered once daily
• Available formulations: Tablets (6 mg, 18 mg, 30 mg, 36 mg) and oral suspension (22.75 mg/mL)
• If using tablets, round up to the nearest possible dose; any combination of tablet strengths may be used to achieve the calculated dose
• If using oral suspension, round up to the nearest tenth of a millilitre (mL)

Off-Label Dosing (India)

For off-label inflammatory and autoimmune indications, the typical adult dose ranges from 6 to 48 mg/day, depending on the condition, severity, and clinical response.

The dose is usually started at a higher level and tapered gradually to the lowest effective maintenance dose.

Dosing should always be individualised under medical supervision.

For children (off-label), the dosage is typically based on body weight, ranging from 0.5 to 1.5 mg/kg/day depending on the condition and severity.

Take deflazacort with or without food. Swallow the tablet whole.

Follow your healthcare provider’s instructions strictly.

If a dose is missed, take it as soon as you remember. If it’s close to the time for your next dose, skip the missed dose and resume your regular schedule. Do not double the dose to make up for the missed one.

Important Safety Information

Side Effects of Deflazacort

While Deflazacort can be effective, it may also cause side effects.

Common Side Effects

• Weight gain
• Increased appetite
• Mood changes (e.g., anxiety, depression)
• Insomnia
• High blood sugar levels

Serious Side Effects

• Increased risk of infections
• Osteoporosis (bone thinning)
• Gastrointestinal issues (e.g., ulcers)
• Eye problems (e.g., cataracts, glaucoma)
• Adrenal suppression (the body’s inability to produce natural steroids)

Drug Interactions

Deflazacort can interact with several medications and substances, including:

• CYP3A4 inhibitors: Strong CYP3A4 inhibitors (such as ketoconazole, itraconazole, clarithromycin, and ritonavir) can increase deflazacort levels. If co-administration cannot be avoided, the deflazacort dose should be reduced to one-third of the recommended dose.
• CYP3A4 inducers: Drugs such as rifampicin, carbamazepine, phenytoin, and phenobarbital can reduce deflazacort levels, potentially decreasing its effectiveness.
• Anticoagulants: Such as warfarin, which may have altered effects.
• Antidiabetic medications: May require adjustments due to increased blood sugar levels.
• Nonsteroidal anti-inflammatory drugs (NSAIDs): Increased risk of gastrointestinal bleeding.
• Vaccines: Live-attenuated vaccines are contraindicated. Killed or inactivated vaccines may have reduced immunological response during corticosteroid therapy.

Always inform your healthcare provider about all medications and supplements you are taking to avoid potential interactions.

Benefits of Deflazacort

Despite the risks associated with long-term corticosteroid use, deflazacort offers several benefits when used appropriately:

• DMD: In Duchenne muscular dystrophy, deflazacort has been shown to prolong ambulation (ability to walk), slow the decline of muscle strength, reduce the risk of scoliosis, and delay the onset of cardiomyopathy and respiratory decline.
• Comparatively bone-sparing: Compared with other corticosteroids such as prednisone, deflazacort has been associated with a lower impact on bone mineral density, making it a preferred choice when long-term corticosteroid therapy is required.
• Anti-inflammatory efficacy: Effective in reducing inflammation and immune-mediated tissue damage in a range of autoimmune and inflammatory conditions.
• Immunosuppression: Useful in managing conditions where suppression of the immune system is required, including organ transplant recipients.

Contraindications of Deflazacort

Certain individuals should avoid using Deflazacort, including:

• Pregnant Women: It may harm the fetus. Its use should be carefully considered, and a pregnancy test may be required before starting treatment if pregnancy is possible.
• Individuals with Active Infections: It can suppress the immune system, significantly increasing the risk of worsening or spreading infections.
• Patients with Certain Health Conditions: Such as severe liver disease, active peptic ulcers, or uncontrolled diabetes.

Always consult a healthcare provider to determine if Deflazacort is appropriate for your situation.

Precautions and Warnings

Before starting Deflazacort, consider the following precautions:

• Regular Monitoring: Patients may require regular blood tests to monitor blood sugar levels, liver function, and other parameters.
• Gradual Discontinuation: If you have been on Deflazacort for an extended period, it is crucial to taper off the medication gradually to avoid withdrawal symptoms.
• Vaccination: Discuss vaccination plans with your healthcare provider, especially regarding live vaccines.
• Infection Risk: Be vigilant for any signs of infection (fever, sore throat, increased pain), and report them promptly to your doctor, as your immune system may be suppressed.

Frequently Asked Questions (FAQs)

What is Deflazacort used for?

Deflazacort is FDA-approved for the treatment of Duchenne muscular dystrophy (DMD) in patients aged 2 years and older. In India, it is also widely used off-label for autoimmune and inflammatory conditions such as rheumatoid arthritis, asthma, nephrotic syndrome, and severe allergic conditions.

What is the correct dose for DMD?

The FDA-approved dose for DMD is 0.9 mg/kg/day, administered once daily. The dose is based on the patient’s body weight and should be calculated by the prescribing physician.

How should I take Deflazacort?

It is usually taken orally in tablet form or administered via injection, as directed by your healthcare provider.

What are the common side effects?

Common side effects include weight gain, increased appetite, mood changes, and insomnia.

Can I stop deflazacort suddenly?

No. Deflazacort must not be stopped abruptly after prolonged use. Doses should be tapered gradually under medical supervision to avoid adrenal crisis.

Can I take Deflazacort if I am pregnant?

Deflazacort should be used during pregnancy only if the potential benefit justifies the risk to the foetus. There are no adequate human studies. Discuss with your doctor.

Can I receive vaccines while on deflazacort?

Live vaccines are contraindicated during immunosuppressive doses. Killed or inactivated vaccines may be given but may have a reduced response. All vaccinations should ideally be completed before starting deflazacort.

Is deflazacort the same as prednisolone?

No. While both are corticosteroids, deflazacort is a distinct drug with a different pharmacological profile.

Studies suggest deflazacort may have a comparatively lower impact on bone mineral density and weight gain than prednisone/prednisolone, which is one reason it is preferred for long-term use in DMD.

How does Deflazacort work?

It mimics natural hormones to reduce inflammation and suppress the immune response.

Are there any serious side effects?

Yes, serious side effects can include increased risk of infections, osteoporosis, and gastrointestinal issues.

Can I stop taking Deflazacort suddenly?

No, it is important to taper off the medication gradually under medical supervision to avoid withdrawal symptoms.

What should I do if I miss a dose?

Take the missed dose as soon as you remember, but skip it if it’s almost time for your next dose. Do not double up.

Can Deflazacort interact with other medications?

Yes, it can interact with anticoagulants, antidiabetic medications, and NSAIDs, among others.

How long can I take Deflazacort?

The duration of treatment varies based on the condition being treated. Follow your doctor’s advice for the best outcome.

Does deflazacort affect blood sugar levels?

Yes. Deflazacort can cause hyperglycaemia (elevated blood sugar) and may unmask latent diabetes or worsen existing diabetes.

Blood glucose levels should be monitored regularly, particularly during long-term use.

Should children on deflazacort for DMD be monitored differently?

Yes. Paediatric patients on long-term deflazacort for DMD require regular monitoring of growth, bone mineral density, blood glucose, ophthalmological examinations, and adrenal function.

Your child’s doctor will schedule these assessments.

Brand Names

Deflazacort is marketed under several brand names, including:

• Emflaza
• Deflazacort
• Deflazacort Sandoz

Conclusion

Deflazacort is a versatile corticosteroid medication that plays a crucial role in managing various inflammatory and autoimmune conditions.

While it offers significant benefits, including a lower risk of certain side effects compared to other corticosteroids, it is essential to be aware of all potential side effects and drug interactions.

Always consult with your healthcare provider to determine the best treatment plan tailored to your needs, and maintain open communication about any new or worsening symptoms, especially during long-term use or when adjusting dosage.