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Drugs A–Z

Nemolizumab

Nemolizumab is a prescription medicine (Interleukin-31 Receptor alpha Antagonist). The sections below reproduce one FDA label for it, named under "Label". Products in other forms, strengths or from other makers have their own labels, which can differ.

Type
Prescription only (Rx)
Brand names
Nemluvio
Drug class
Interleukin-31 Receptor alpha Antagonist
Taken
Subcutaneous
Label
Galderma Laboratories, L.P., revised June 26, 2025 · full label on DailyMed
Biosimilars
1 approved · details

What it is used for

NEMLUVIO is an interleukin-31 receptor antagonist indicated for: Prurigo Nodularis The treatment of adults with prurigo nodularis. ( 1.1 ) Atopic Dermatitis The treatment of adults and pediatric patients 12 years of age and older with moderate-to-severe atopic dermatitis in combination with topical corticosteroids and/or calcineurin inhibitors when the disease is not adequately controlled with topical prescription therapies. ( 1.2 )

1.1 Prurigo Nodularis NEMLUVIO is indicated for the treatment of adults with prurigo nodularis.

1.2 Atopic Dermatitis NEMLUVIO is indicated for the treatment of adults and pediatric patients 12 years of age and older with moderate-to-severe atopic dermatitis in combination with topical corticosteroids and/or calcineurin inhibitors when the disease is not adequately controlled with topical prescription therapies.

Forms and strengths

For injection: single-dose, prefilled, dual-chamber pen containing 30 mg of nemolizumab-ilto as a white lyophilized powder in one chamber and diluent, water for injection, in the other chamber. For injection: single-dose, prefilled, dual-chamber pen containing 30 mg of nemolizumab-ilto lyophilized powder and diluent, water for injection. ( 3 )

Who should not take it (contraindications)

NEMLUVIO is contraindicated in patients who have known hypersensitivity to nemolizumab-ilto or to any of the excipients in NEMLUVIO [ see Warnings and Precautions (5.1) ]. Known hypersensitivity to nemolizumab-ilto or to any of the excipients in NEMLUVIO. ( 4 )

Warnings and precautions

Hypersensitivity: Hypersensitivity reactions have been reported with NEMLUVIO use. If a clinically significant hypersensitivity reaction occurs, immediately institute appropriate therapy and discontinue NEMLUVIO. ( 5.1 ) Vaccinations: Avoid use of live vaccines during treatment with NEMLUVIO. ( 5.2 )

5.1 Hypersensitivity Hypersensitivity reactions, such as facial angioedema, have been reported with use of NEMLUVIO. NEMLUVIO is contraindicated in patients with a known hypersensitivity to nemolizumab-ilto or to any of the excipients in NEMLUVIO. If a clinically significant hypersensitivity reaction occurs, immediately institute appropriate therapy and discontinue NEMLUVIO [ see Contraindications (4) , Adverse Reactions (6.1) ].

5.2 Vaccinations Complete all age-appropriate vaccinations as recommended by current immunization guidelines prior to treatment with NEMLUVIO. Avoid use of live vaccines in patients during treatment with NEMLUVIO. It is unknown if administration of live vaccines during NEMLUVIO treatment will impact the safety or effectiveness of these vaccines. No data are available on the response to non-live vaccines.

Side effects (adverse reactions)

The following clinically significant adverse reactions are described in greater details elsewhere in the labeling: Hypersensitivity [ see Warnings and Precautions (5.1) ] Most common adverse reactions are: Prurigo Nodularis (incidence ≥1%): headache, dermatitis atopic, eczema, and eczema nummular. ( 6.1 ) Atopic Dermatitis (incidence ≥1%): headache (including migraine), arthralgia, urticaria, and myalgia. ( 6.1 ) To report SUSPECTED ADVERSE REACTIONS, contact Galderma Laboratories, L.P. at 1-866-735-4137 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch .

6.1 Clinical Trials Experience Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in practice. Prurigo Nodularis A total of 508 adult subjects with prurigo nodularis were treated with NEMLUVIO in two placebo-controlled trials and an open label long-term extension trial. Of these, 375 subjects were exposed for at least 1 year in the drug development program for prurigo nodularis. The safety of NEMLUVIO in adult subjects with prurigo nodularis was evaluated in two randomized, doubleblind, placebo-controlled, multicenter trials (OLYMPIA 1 and OLYMPIA 2). Subjects were treated for up to 24 weeks in OLYMPIA 1 and up to 16 weeks in OLYMPIA 2. In these 2 trials, 370 subjects were treated with subcutaneous injections of NEMLUVIO, and 186 subjects received placebo [ see Clinical Studies (14.1 )]. Subjects weighing less than 90 kg in the NEMLUVIO group received an initial NEMLUVIO dose of 60 mg or placebo at Week 0, followed by a NEMLUVIO dose of 30 mg or placebo every 4 weeks. Subjects weighing 90 kg or more in the NEMLUVIO group received an initial NEMLUVIO dose of 60 mg or placebo at Week 0 followed by a NEMLUVIO dose of 60 mg or placebo every 4 weeks. During the treatment period in Trials OLYMPIA 1 and OLYMPIA 2, the proportion of subjects who discontinued treatment because of adverse reactions was 4% in the NEMLUVIO group versus 3% in the placebo group. Table 1 summarizes the adverse reactions that occurred at a rate of at least 1% in the NEMLUVIO group, and for which the rate exceeds the rate in the placebo group through Week 16. Table 1: Adverse Reactions Occurring in ≥1% of Adult Subjects with Prurigo Nodularis in the NEMLUVIO Group and Greater than Placebo in the OLYMPIA 1 and OLYMPIA 2 Trials through Week 16. *includes: headache and tension headache Adverse Reaction NEMLUVIO N= 370 n (%) Placebo (N= 186) n (%) Headache* 23 (6) 6 (3) Dermatitis atopic 16 (4) 1 (0.5) Eczema 14 (4) 3 (2) Eczema nummular 11 (3) 0 Specific Adverse Reactions Hypersensitivity reactions Type 1 hypersensitivity reactions (Ig-E mediated reactions), including one report of discrete facial (peri-ocular) angioedema, were reported in subjects treated with NEMLUVIO [ see Contraindications (4) ]. Atopic Dermatitis Adults and Pediatric Subjects 12 Years of Age and Older A total of 1148 subjects, including 180 subjects 12 to 17 years of age, with moderate-to-severe atopic dermatitis were treated with NEMLUVIO for at least 1 year during the drug development program. The safety of NEMLUVIO was evaluated in a pool of two randomized, double-blind, placebo-controlled, multicenter phase 3 trials (ARCADIA 1, ARCADIA 2). In these two trials, 1135 adult and pediatric subjects 12 years of age and older with moderate-to-severe AD were treated with subcutaneous injections of NEMLUVIO (initial dose of 60 mg, followed by 30 mg every 4 weeks), with concomitant topical corticosteroids (TCS) and/or topical calcineurin inhibitors (TCI) for up to 16 weeks (Initial Treatment Period) [ see Clinical Studies (14.2 )]. After the Initial Treatment Period, subjects who responded to NEMLUVIO were re-randomized to receive NEMLUVIO 30 mg every 4 weeks, NEMLUVIO 30 mg every 8 weeks, or placebo every 4 weeks for the Maintenance Treatment Period (Week 16 through Week 48) [see Clinical Studies (14.2)] . The safety population during the Maintenance Treatment Period had a mean age of 31 to 33 years (median age of 26 to 29 years) for the NEMLUVIO cohorts. Week 0 to Week 16 In ARCADIA 1 and ARCADIA 2 trials through Week 16, the proportion of subjects who discontinued treatment because of adverse events was 2.3% in the NEMLUVIO every 4 weeks group and 2.2% in the placebo groups. Table 2 summarizes the adverse reactions that occurred at a rate of at least 1% in the NEMLUVIO group, and for which the rate exceeds the rate in the placebo group during the first 16 weeks of treatment. Table 2: Adverse Reactions Occurring in ≥1% of Adult and Pediatric Subjects 12 Years of Age and Older with Atopic Dermatitis in the NEMLUVIO Group and Greater than in the Placebo Group in ARCADIA 1 and ARCADIA 2 Trials through Week 16 Adverse reactions NEMLUVIO N = 1135 n (%) Placebo N=584 n (%) Headache (incl. migraine) 52 (5) 22 (4) Arthralgia 12 (1) 1 (0.2) Urticaria 12 (1) 2 (0.3) Myalgia 11 (1) 1 (0.2) Assessment of the safety profile of NEMLUVIO in 505 subjects up through Week 48 in the ARCADIA 1 and ARCADIA 2 trials was generally consistent with the safety profile observed at Week 16. Specific Adverse Reactions Hypersensitivity reactions Type 1 hypersensitivity reactions (Ig-E mediated reactions) were reported in subjects treated with NEMLUVIO. This included occurrence of mild urticaria that did not lead to discontinuation of treatment. Injection site reactions The incidence of injection site reactions during the initial treatment period was reported for 1.2% of subjects treated with NEMLUVIO and 0.9% of subjects receiving placebo; during the maintenance period, the incidence was 0.6% with NEMLUVIO every 4 weeks, 0% with NEMLUVIO every 8 weeks, and 0% with placebo. None of these reactions led to discontinuation of treatment. Herpes Zoster During the initial treatment period, herpes zoster infections were reported in 5 subjects (0.4%) treated with NEMLUVIO (including 1 case of ophthalmic herpes zoster) and no subjects receiving placebo. Cases of herpes zoster were mild to moderate in severity and did not lead to discontinuation of treatment. Pediatric Subjects 12 Years of Age and Older The safety of NEMLUVIO was assessed in 176 subjects 12 to 17 years of age with moderate-to-severe atopic dermatitis enrolled in the ARCADIA 1 or ARCADIA 2 trials who received at least one dose of NEMLUVIO from Week 0 to Week 16 in the primary safety population. The safety profile of NEMLUVIO in these subjects through Week 16 was consistent with the safety profile observed in adults with atopic dermatitis. The safety profile of NEMLUVIO in 98 subjects 12 to 17 years of age followed through Week 48 was consistent with the safety profile observed at Week 16.

Pregnancy, breastfeeding, children and older adults

8.1 Pregnancy Risk Summary Available data on NEMLUVIO use in pregnant women exposed during clinical trials are insufficient to evaluate for a drug-associated risk of major birth defects, miscarriage, or other adverse maternal or fetal outcomes. In an enhanced pre- and postnatal development study in cynomolgus monkeys, when nemolizumab-ilto was administered subcutaneously during organogenesis to parturition, an increase in early postnatal death was observed at a dose 36 times the maximum recommended human dose (MRHD) for PN and 50 times for AD (see Data). The clinical significance of this nonclinical finding is unknown. The background risk of major birth defects and miscarriage for the indicated populations are unknown. All pregnancies have a background risk of birth defects, loss, or other adverse outcomes. In the U.S. general population, the estimated background risk of major birth defects and miscarriage in clinically recognized pregnancies is 2% to 4% and 15% to 20%, respectively. Clinical Considerations Fetal/Neonatal Adverse Reactions Transport of endogenous IgG antibodies across the placenta increases as pregnancy progresses, and peaks during the third trimester. Therefore, NEMLUVIO may be present in infants exposed in utero. The potential impact of infants being exposed in utero to NEMLUVIO should be considered. Data Animal Data In an enhanced pre- and postnatal development study, subcutaneous doses up to 25 mg/kg of nemolizumab-ilto were administered to pregnant cynomolgus monkeys once every two weeks during organogenesis to parturition. No maternal or embryofetal toxicities were observed at doses up to 25 mg/kg (36 times the MRHD for PN and 50 times for AD, based on AUC comparison). Early postnatal death occurred in the offspring of one control monkey and 3 monkeys at 25 mg/kg (36 times the MRHD for PN and 50 times for AD, based on AUC comparison). The clinical significance of this nonclinical finding is unknown. Nemolizumab-ilto was administered subcutaneously to the offspring at doses up to 25 mg/kg (122 times the MRHD for PN and 168 times for AD, based on AUC comparison), once every 2 weeks for 6 months, starting from postnatal day 35. No adverse effects were noted in the remaining offspring.

8.2 Lactation Risk Summary There are no data on the presence of nemolizumab-ilto in human milk, the effects on the breastfed infant, or the effects on milk production. Nemolizumab-ilto was detected in breast milk of monkeys (see Data). Endogenous maternal IgG and monoclonal antibodies are transferred in human milk. The effects of local gastrointestinal exposure and limited systemic exposure in the breastfed infant to nemolizumab-ilto are unknown. The developmental and health benefits of breastfeeding should be considered along with the mother’s clinical need for NEMLUVIO and any potential adverse effects on the breastfed child from NEMLUVIO or from the underlying maternal condition. Data Nemolizumab-ilto was detected in breast milk of monkeys in the enhanced pre- and postnatal development study following subcutaneous doses up to 25 mg/kg once every two weeks during organogenesis to parturition. The mean nemolizumab-ilto concentrations in milk were approximately 0.3 – 0.5% of the maternal plasma levels from lactation day 7 to 63. The concentration of nemolizumab-ilto in animal milk does not necessarily predict the concentration of drug in human milk.

8.4 Pediatric Use Prurigo Nodularis The safety and effectiveness of NEMLUVIO have not been established in pediatric patients. Atopic Dermatitis The safety and effectiveness of NEMLUVIO for the treatment of moderate-to-severe atopic dermatitis in combination with topical corticosteroids and/or calcineurin inhibitors have been established in pediatric patients 12 years of age and older whose disease is not adequately controlled with topical prescription therapies. Use of NEMLUVIO for this indication is supported by evidence from two randomized, double-blind, placebo-controlled trials [ See Adverse Reactions (6.1) and Clinical Studies (14.2) ]. The safety and effectiveness of NEMLUVIO have not been established in pediatric patients younger than 12 years of age.

8.5 Geriatric Use Prurigo Nodularis Of the 370 subjects with prurigo nodularis exposed to NEMLUVIO in OLYMPIA 1 and OLYMPIA 2, 99 (26.8%) subjects were 65 years of age or older. The long-term safety of NEMLUVIO was assessed in 508 subjects, among which 133 (26.2%) were 65 years of age or older. Clinical trials of NEMLUVIO did not include sufficient numbers of subjects 65 years of age or older to determine whether they respond differently than younger adult subjects. [ see Clinical Pharmacology (12.3) ]. Atopic Dermatitis Of the 1192 subjects with atopic dermatitis exposed to NEMLUVIO in the primary safety population, 72 (6.0%) subjects were 65 years of age or older. The long-term safety of NEMLUVIO was assessed in 78 (4.5%) subjects 65 years of age or older. Clinical studies of NEMLUVIO did not include sufficient numbers of subjects aged 65 and over to determine whether they respond differently from younger adult subjects [ see Clinical Pharmacology (12.3) ].

How it works

Nemolizumab-ilto is a humanized IgG2 monoclonal antibody that inhibits IL-31 signaling by binding selectively to IL-31 RA. IL-31 is a naturally occurring cytokine that is involved in pruritus, inflammation, epidermal dysregulation, and fibrosis. Nemolizumab-ilto inhibited IL-31-induced responses including the release of proinflammatory cytokines and chemokines.

Are there biosimilars to Nemolizumab?

Yes. The FDA has approved 1 biosimilars; 1 of those approvals are active (not discontinued). As with generics, approval does not guarantee a product is stocked or covered.

  • Nemluvio Galderma Labs Lp, approved 2024

Biologics have biosimilars rather than generics: highly similar versions with no clinically meaningful differences. Only biosimilars the FDA designates as interchangeable can be swapped at the pharmacy without asking the prescriber, where state law allows; the FDA Purple Book lists which ones are.

Source: Drugs@FDA (via openFDA), checked October 29, 2026. Marketing status is what companies report to the FDA; whether a pharmacy stocks a product, and what your insurance covers, can differ.

Dosage:
we do not reproduce dosing instructions. The right dose depends on the person and the condition and is set by the prescriber or pharmacist. Dosage section of the full label.

Nemolizumab in the news

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Source: FDA structured product labeling, retrieved through openFDA. Label text is shown as published by the FDA, without editing; long sections are shortened, marked […]. openFDA data are not validated for clinical use — always check the current label and ask a doctor or pharmacist about your own treatment. Set ID e9229ef1-ac60-4c24-afb6-009d3c781687.


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Important: this content is for informational purposes only and is not medical advice, a prescribing instruction, or a recommendation to act. Consult a licensed healthcare professional before taking any medication.

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