Skip to main content

Patient Recruitment

An Open-Label Phase 3 Study of the Safety and Efficacy of Pegvisomant in Children with Growth Hormone Excess

Research Study for Children with Growth Hormone Excess

A medical pad with the text Human Growth Hormone HGH written on it

smiling children

Gigantism is a condition characterized by excessive growth and height significantly above average, caused by over-production of growth hormone (GH) during childhood. Investigators at the National Institutes of Health (NIH) want to see if a drug that antagonizes growth hormone action, called pegvisomant, can help children and adolescents with gigantism.

Study Design:

  • All visits include medical history, physical exam, & questionnaires
  • Participants will have regular blood tests and imaging studies
  • All study-related evaluations and medications are free
  • Travel and lodging assistance will be provided

Who can participate?

  • People 2 -18 years old* with GH excess for whom surgical treatment has not worked or who are not eligible for that
  • Insulin-like growth factor-1 (IGF-1) greater than the upper limit of normal for age and gender
  • Elevated growth hormone levels
  • Not currently taking other medications for the management of growth hormone excess

* Parents must give permission for minors to participate.

The NIH Clinical Center, America's Research Hospital, is located on the Metro Red Line (Medical Center stop) in Bethesda, Maryland.

For more information:
Office of Patient Recruitment
TTY for the deaf and hard of hearing: 866-411-1010
Se habla español

Or go online:
(Refer to study # 19-CH-0071)

Department of Health and Human Services
National Institutes of Health Clinical Center (CC)
National Institute of Child Health and Human Development (NICHD)

NOTE: PDF documents require the free Adobe Reader.

This page last updated on 10/22/2021

You are now leaving the NIH Clinical Center website.

This external link is provided for your convenience to offer additional information. The NIH Clinical Center is not responsible for the availability, content or accuracy of this external site.

The NIH Clinical Center does not endorse, authorize or guarantee the sponsors, information, products or services described or offered at this external site. You will be subject to the destination site’s privacy policy if you follow this link.

More information about the NIH Clinical Center Privacy and Disclaimer policy is available at