A Study to Learn How Different Injector Pens Affect the Study Medicine Called Genotropin® (somatropin) Delivery and Taken Up Into the Blood in Healthy Adults

2026-525165-52-00 Protocol A6281331 Human pharmacology (Phase I) - Bioequivalence study Ongoing, recruiting

Start 14 Apr 2026 · Status Ongoing, recruiting · 1 EU/EEA countries · 1 sites · Protocol A6281331

Overview

Sponsor-declared trial summary

Phase Human pharmacology (Phase I) - Bioequivalence study
Status Ongoing, recruiting
Participants planned 26
Countries 1
Sites 1

Growth hormone deficiency

Key facts

Sponsor
Pfizer Inc.
Participant type
Healthy volunteers
Age range
18-64 years
Gender
Male and Female
Therapeutic area
Diseases [C] - Hormonal diseases [C19]
Trial duration
14 Apr 2026 → ongoing
Decision date (initial)
2026-03-25
Transition trial
No
Low-intervention
No
Rare-disease indication
No
Vulnerable population
Yes

Trial design

CTIS Part I — objectives, methods, condition coding

Conditions and MedDRA coding

Growth hormone deficiency

VersionLevelCodeTermSystem organ class
20.0 PT 10056438 Growth hormone deficiency 100000004860

Sponsors and contacts

Sponsor organisations, regulatory contacts, third parties

Pfizer Inc.

Sponsor organisation
Pfizer Inc.
Address
66 Hudson Boulevard East
City
New York
Postcode
10001-2189
Country
United States

Scientific contact point

Organisation
Pfizer Inc.
Contact name
Clinical Medical Lead

Public contact point

Organisation
Pfizer Inc.
Contact name
Clinical Medical Lead

Locations

1 EU/EEA country · 1 investigational sites

By country

CountryMS statusPlanned subjectsSites
Belgium Ongoing, recruiting 26 1
Rest of world 0

Investigational sites

Belgium

1 site · Ongoing, recruiting
Pfizer Clinical Research Unit
Not applicable, Route de Lennik 808, B-1070, Brussels

Country notifications

Trial-start, recruitment-start, end and early-termination notifications submitted per Member State

Country Trial startTrial end Recruitment startRecruitment end Early termination
Belgium 2026-04-14 2026-04-22

Application history

1 submissions — initial application plus substantial / non-substantial modifications

#TypeCodeSubmittedReference MSConclusionDecision date
1 INITIAL IN 2026-02-18 Belgium Acceptable
2026-03-25
2026-03-25