—BRINSUPRI, a First-in-Disease and First-in-Class Treatment for Patients With Non-Cystic Fibrosis Bronchiectasis (NCFB), Is Now Available by Prescription in Japan—
BRIDGEWATER, N.J., Oct. 19, 2026 /PRNewswire/ -- Insmed Incorporated (Nasdaq: INSM), a people-first global biopharmaceutical company striving to deliver first- and best-in-class therapies to transform the lives of patients facing serious diseases, today announced the commercial launch in Japan of BRINSUPRI® Tablets 25 mg (brensocatib hydrate), an oral, once-daily treatment for non-cystic fibrosis bronchiectasis (NCFB) in adults and pediatric patients 12 years and older.
"The commercial availability of BRINSUPRI in Japan is a meaningful step forward for the bronchiectasis community and a proud moment for our team," said Samuele Butera, Senior Vice President, General Manager, Global Respiratory for Insmed. "As the first approved therapy specifically designed to address the underlying inflammatory process of NCFB, we are pleased that BRINSUPRI can be made widely available to appropriate patients in Japan who have long needed a treatment option that addresses an unmet driver of their disease."
BRINSUPRI is the first and only approved and commercially available treatment for patients diagnosed with NCFB in Japan. The Japan Ministry of Health, Labour, and Welfare (MHLW) approved BRINSUPRI in August 2026 based on results from the Phase 3 ASPEN study.
"In patients living with bronchiectasis, recurrent exacerbations represent a substantial disease burden, making daily life harder to manage and affecting long-term clinical outcomes," said Makoto Nakamura, Senior Vice President, General Manager, Japan for Insmed. "By offering BRINSUPRI as a new treatment option for appropriate patients in Japan, we hope to contribute to better disease management for eligible patients. Insmed remains committed to supporting the bronchiectasis community through appropriate information provision to healthcare professionals and advancing the proper use of this therapy."
About Bronchiectasis
Bronchiectasis is a serious, chronic lung disease in which the bronchi become permanently dilated due to a cycle of infection, inflammation, and lung tissue damage. The condition is marked by frequent pulmonary exacerbations requiring antibiotic therapy and/or hospitalizations. Symptoms include chronic cough, excessive sputum production, shortness of breath, and repeated respiratory infections, which can worsen the underlying condition. Most bronchiectasis cases in adults are non-cystic fibrosis bronchiectasis (NCFB).
About BRINSUPRI
BRINSUPRI® (brensocatib) is a small molecule, once-daily, oral, reversible inhibitor of dipeptidyl peptidase 1 (DPP1), designed to inhibit the activation of enzymes (neutrophil serine proteases) in neutrophils that are key drivers of chronic airway inflammation in non-cystic fibrosis bronchiectasis (NCFB). The therapy is approved in the United States as BRINSUPRI (brensocatib 10 mg and 25 mg tablets) and indicated for the treatment of NCFB in adult and pediatric patients 12 years of age or older. In the European Union and United Kingdom, BRINSUPRI (brensocatib 25 mg tablets) is approved for the treatment of NCFB in patients 12 years of age and older with two or more exacerbations in the prior 12 months. In Japan, BRINSUPRI Tablets 25 mg (brensocatib hydrate) is approved for the treatment of NCFB in adults and pediatric patients 12 years and older.
INDICATION AND IMPORTANT SAFETY INFORMATION FOR BRINSUPRI IN THE U.S.
U.S. Indication
BRINSUPRI is indicated for the treatment of non-cystic fibrosis bronchiectasis (NCFB) in adult and pediatric patients 12 years of age and older.
Important Safety Information
WARNINGS AND PRECAUTIONS
Dermatologic Adverse Reactions
Treatment with BRINSUPRI is associated with an increase in dermatologic adverse reactions, including rash, dry skin, and hyperkeratosis. Monitor patients for development of new rashes or skin conditions and refer patients to a dermatologist for evaluation of new dermatologic findings.
Gingival and Periodontal Adverse Reactions
Treatment with BRINSUPRI is associated with an increase in gingival and periodontal adverse reactions. Refer patients to dental care services for regular dental checkups while taking BRINSUPRI. Advise patients to perform routine dental hygiene.
Live Attenuated Vaccines
It is unknown whether administration of live attenuated vaccines during BRINSUPRI treatment will affect the safety or effectiveness of these vaccines. The use of live attenuated vaccines should be avoided in patients receiving BRINSUPRI.
ADVERSE REACTIONS
The most common adverse reactions ≥2% in the ASPEN trial included upper respiratory tract infection, headache, rash, dry skin, hyperkeratosis, and hypertension. The safety profile for adult patients with NCFB in WILLOW was generally similar to ASPEN, except for a higher incidence of gingival and periodontal adverse reactions.
Less Common Adverse Reactions
Liver Function Test Elevations
In ASPEN, there was an increase from baseline in average ALT, AST, and alkaline phosphatase levels at all time points from Week 4 through Week 56 in both BRINSUPRI 10 mg and 25 mg arms compared to placebo. The incidence of ALT >3X upper limit of normal (ULN) was 0%, 1.2%, and 0.9%; the incidence of AST >3X ULN was 0.2%, 0.3%, and 0.5%; and the incidence of alkaline phosphatase >1.5X ULN was 2.5%, 4.1%, and 4.0% in patients treated with placebo and BRINSUPRI 10 mg and 25 mg, respectively.
Skin Cancers
In ASPEN, the incidence of skin cancers among patients treated with BRINSUPRI 10 mg and 25 mg was 0.5% and 1.9%, respectively, compared to 1.1% in placebo-treated patients.
Alopecia
In ASPEN, the incidence of alopecia among patients treated with BRINSUPRI 10 mg and 25 mg was 1.5% and 1.6%, respectively, compared to 0.4% in placebo-treated patients.
USE IN SPECIFIC POPULATIONS
Pregnancy: There are no clinical data on the use of BRINSUPRI in pregnant women.
Lactation: There is no information regarding the presence of BRINSUPRI and/or its metabolite(s) in human milk, the effects on the breastfed infant, or the effects on milk production. The developmental and health benefits of breastfeeding should be considered along with the mother's clinical need for BRINSUPRI and any potential adverse effects on the breastfed child from BRINSUPRI or from the underlying maternal condition.
Pediatric use: The safety and effectiveness of BRINSUPRI for the treatment of NCFB have been established in pediatric patients aged 12 years and older. Common adverse reactions in pediatric patients aged 12 years and older enrolled in ASPEN were consistent with those in adults. The safety and effectiveness of BRINSUPRI have not been established in pediatric patients younger than 12 years of age.
Please see full US Prescribing Information.
About Insmed
Insmed Incorporated is a people-first global biopharmaceutical company striving to deliver first- and best-in-class therapies to transform the lives of patients facing serious diseases. The Company is advancing a diverse portfolio of approved and mid- to late-stage investigational medicines — including two approved therapies to treat chronic, debilitating lung diseases — as well as cutting-edge drug discovery focused on serving patient communities where the need is greatest. Insmed's commercial portfolio and clinical pipeline are organized around three therapeutic areas: Respiratory, Immunology & Inflammation, and Neuro & Other Rare. The Company's research engine is advancing a wide range of technologies and modalities, including gene therapy, AI-driven protein engineering, RNA end-joining, and synthetic rescue, in the pursuit of future pipeline candidates.
Headquartered in Bridgewater, New Jersey, Insmed has offices and research locations throughout the United States, Europe, and Japan. Visit www.insmed.com to learn more or follow us on LinkedIn, Instagram, YouTube, and X.
Forward-looking Statements
This press release contains forward-looking statements that involve substantial risks and uncertainties. "Forward-looking statements," as that term is defined in the Private Securities Litigation Reform Act of 1995, are statements that are not historical facts and involve a number of risks and uncertainties. Words herein such as "may," "will," "should," "could," "would," "expects," "plans," "anticipates," "believes," "estimates," "projects," "predicts," "intends," "potential," "continues," and similar expressions (as well as other words or expressions referencing future events, conditions or circumstances), may identify forward-looking statements.
The forward-looking statements in this press release are based upon the Company's current expectations and beliefs, and involve known and unknown risks, uncertainties and other factors, which may cause the Company's actual results, performance and achievements and the timing of certain events, to differ materially from the results, performance, achievements or timings discussed, projected, anticipated or indicated in any forward-looking statements. Such risks, uncertainties and other factors include, among others, the following: failure to successfully commercialize BRINSUPRI in the U.S., Europe, or Japan, or to maintain U.S.