Clinical trial Recruiting at 27 sites Observational Ages 1 Year to 18

Long-term safety assessment of lonapegsomatropin in children with growth hormone deficiency

Official title: A Prospective, Non-interventional (NIS), Long-term, Post-Authorisation Safety Study (PASS) of Patients Treated With Lonapegsomatropin

Run by Ascendis Pharma A/S · NCT05775523 · Data updated 2026-11-12

This study looks at the long-term safety of lonapegsomatropin in children with growth hormone deficiency who are already being treated with it.

More Growth Hormone Deficiency trials

Quick facts

Study typeObservational
Ages1 Year to 18 Years
SexAll
Enrollment500 (estimated)
SponsorAscendis Pharma A/S
Industry-sponsored
Locations27 sites (Phoenix, Arizona and 26 other locations)
StatusRecruiting
StartedMarch 20, 2023
Main results expectedMarch 2033
Study endsMarch 2033
Registry record updatedFebruary 4, 2026
Trial IDNCT05775523 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates for this study are pediatric patients with growth hormone deficiency currently being treated with lonapegsomatropin.

Probably not a fit

Patients who are participating in other interventional trials for short stature or those with contraindications to lonapegsomatropin will not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This observational study aims to evaluate the long-term safety profile of lonapegsomatropin in pediatric patients diagnosed with growth hormone deficiency (GHD) who are currently receiving this treatment. By monitoring these patients in real-world clinical settings, the study seeks to identify any potential safety risks associated with lonapegsomatropin over time. The study does not involve any new interventions, focusing instead on the safety outcomes of patients already on treatment. Participants will be required to provide informed consent and comply with follow-up protocols.

Why it matters

Potential benefit: If successful, this study could provide valuable insights into the long-term safety of lonapegsomatropin, helping to ensure better management of growth hormone deficiency in children.

How similar studies have gone: While this study focuses on the long-term safety of an existing treatment, similar observational studies have previously demonstrated the importance of post-marketing safety assessments, suggesting a potential for valuable findings.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Paediatric patients with GHD who are on treatment with lonapegsomatropin
* Patients being clinically managed in Europe or the USA
* Appropriate written informed consent/assent as applicable for the age of the patient
* Patients willing to comply with follow-up requirements of the study

Exclusion Criteria:

* Patients participating in any interventional clinical trial for short stature
* Patients being treated with a GH or IGF-1 therapy, other than lonapegsomatropin, at enrollment
* Patients for whom treatment with lonapegsomatropin is contraindicated
* Patients with closed epiphyses
* Patients with active malignant tumours
* Patients under antitumour therapy within the past 12 months prior to instituting GH therapy
* Hypersensitivity to somatropin or any of the excipients in lonapegsomatropin

Where it's running

  • Ascendis Investigational Site
    Phoenix, Arizona, United States
    Recruiting
  • Ascendis Investigational Site
    Orange, California, United States
    Recruiting
  • Ascendis Investigational Site
    Sacramento, California, United States
    Recruiting
  • Ascendis Investigational Site
    San Francisco, California, United States
    Recruiting
  • Ascendis Pharma Investigational Site
    Centennial, Colorado, United States
    Recruiting
  • Ascendis Investigational Site
    Washington D.C., District of Columbia, United States
    Recruiting
Show 21 more locations
  • Ascendis Investigational Site
    Orlando, Florida, United States
    Recruiting
  • Ascendis Investigational Site
    Orlando, Florida, United States
    Recruiting
  • Ascendis Investigational Site
    Tampa, Florida, United States
    Recruiting
  • Ascendis Investigational Site
    Sandy Springs, Georgia, United States
    Recruiting
  • Ascendis Investigational Site
    Boise, Idaho, United States
    Recruiting
  • Ascendis Investigational Site
    Indianapolis, Indiana, United States
    Recruiting
  • Ascendis Investigational Site
    Iowa City, Iowa, United States
    Recruiting
  • Ascendis Investigational Site
    Louisville, Kentucky, United States
    Recruiting
  • Ascendis Investigational Site
    Minneapolis, Minnesota, United States
    Recruiting
  • Ascendis Investigational Site
    Las Vegas, Nevada, United States
    Recruiting
  • Ascendis Investigational Site
    Lebanon, New Hampshire, United States
    Recruiting
  • Ascendis Investigational Site
    Manchester, New Hampshire, United States
    Recruiting
  • Ascendis Investigational Site
    Morristown, New Jersey, United States
    Recruiting
  • Ascendis Investigational Site
    New Hyde Park, New York, United States
    Recruiting
  • Ascendis Investigational Site
    Cincinnati, Ohio, United States
    Recruiting
  • Ascendis Investigational Site
    Portland, Oregon, United States
    Recruiting
  • Ascendis Investigational Site
    Columbia, South Carolina, United States
    Recruiting
  • Ascendis Investigational Site
    Dallas, Texas, United States
    Recruiting
  • Ascendis Investigational Site
    El Paso, Texas, United States
    Recruiting
  • Ascendis Investigational Site
    Norfolk, Virginia, United States
    Recruiting
  • Ascendis Investigational Site
    Seattle, Washington, United States
    Recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.