Dupilumab

What it is and how it works

Mechanism of Action Dupilumab is a human monoclonal IgG4 antibody that inhibits interleukin-4 (IL-4) and interleukin-13 (IL-13) signaling by specifically binding to the IL-4Rα subunit shared by the IL-4 and IL-13 receptor complexes. Dupilumab inhibits IL-4 signaling via the Type I receptor and both IL-4 and IL-13 signaling through the Type II receptor. Inflammation driven by IL-4 and IL-13 is an important component in the pathogenesis of asthma, AD, CRSwNP, EoE, PN, COPD, CSU, BP, and AFRS.

Mechanism class: Interleukin 4 Receptor alpha Antagonists

Indications

is an interleukin-4 receptor alpha antagonist indicated: Atopic Dermatitis for the treatment of adult and pediatric patients aged 6 months and older with moderate-to-severe AD whose disease is not adequately controlled with topical prescription therapies or when those therapies are not advisable. DUPIXENT can be used with or without topical corticosteroids. Asthma as an add-on maintenance treatment of adult and pediatric patients aged 6 years and older with moderate-to-severe asthma characterized by an eosinophilic phenotype or with oral corticosteroid dependent asthma. Limitations of Use: Not for the relief of acute bronchospasm or status asthmaticus. Chronic Rhinosinusitis with Nasal Polyps as an add-on maintenance treatment in adult and pediatric patients aged 12 years and older with inadequately controlled chronic rhinosinusitis with nasal polyps (CRSwNP). Eosinophilic Esophagitis for the treatment of adult and pediatric patients aged 1 year and older, weighing at least 15 kg, with eosinophilic esophagitis (EoE).

Dosage and administration (summary)

is administered by subcutaneous injection. Atopic Dermatitis Dosage in Adults : Recommended dosage is an initial dose of 600 mg (two 300 mg injections), followed by 300 mg given every 2 weeks (Q2W). Dosage in Pediatric Patients 6 Months to 5 Years of Age : Body Weight Recommended Dosage For pediatric patients 6 months to 5 years of age, no initial loading dose is recommended 5 to less than 15 kg 200 mg (one 200 mg injection) every 4 weeks (Q4W) 15 to less than 30 kg 300 mg (one 300 mg injection) every 4 weeks (Q4W) Dosage in Pediatric Patients 6 Years to 17 Years of Age : Body Weight Initial Loading Dose Subsequent Dosage Q2W – every 2 weeks.

Contraindications

is contraindicated in patients who have known hypersensitivity to dupilumab or any excipients of DUPIXENT . Known hypersensitivity to dupilumab or any excipients in DUPIXENT.

Warnings and precautions

Hypersensitivity: Hypersensitivity reactions including anaphylaxis, acute generalized exanthematous pustulosis (AGEP), serum sickness, angioedema, urticaria, rash, erythema nodosum, and erythema multiforme have occurred. Discontinue DUPIXENT in the event of a hypersensitivity reaction. Conjunctivitis, Keratitis, and Blepharitis: Advise patients to promptly report new onset or worsening eye symptoms to their healthcare provider. If symptoms persist or worsen, consider discontinuation of DUPIXENT. Consider ophthalmological examination, as appropriate.

Pregnancy

Pregnancy Pregnancy Exposure Registry There is a pregnancy exposure registry that monitors pregnancy outcomes in women exposed to DUPIXENT during pregnancy. Risk Summary Available data from case reports and case series with DUPIXENT use in pregnant women have not identified a drug-associated risk of major birth defects, miscarriage, or adverse mate…

Storage and supply

Storage and Handling DUPIXENT is sterile and preservative-free. Discard any unused portion. Store refrigerated at 2°C to 8°C (36°F to 46°F) in the original carton to protect from light. If necessary, DUPIXENT may be kept at room temperature up to 25°C (77°F) for a maximum of 14 days. Do not store above 25°C (77°F).

Source: Dupilumab (Dupixent) — US FDA prescribing information, 2026-04-22, DailyMed. Summarised and shortened; the full label governs. Iranian registration, indications and labelling may differ.