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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

A PHASE 1, OPEN-LABEL, RANDOMIZED, SINGLE-DOSE, CROSSOVER STUDY TO EVALUATE THE BIOEQUIVALENCE OF TWO DIFFERENT INJECTOR PEN DEVICES FOLLOWING SUBCUTANEOUS ADMINISTRATION OF THE SAME GENOTROPIN® (SOMATROPIN) DOSE IN HEALTHY ADULT PARTICIPANTS

Status
Completed
Phases
Phase 1
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT07542886
Enrollment
27
Registered
2026-04-21
Start date
2026-04-22
Completion date
2026-07-24
Last updated
2026-08-10

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Healthy

Keywords

bioequivalence, genotropin, adult

Brief summary

The purpose of this clinical study is to learn about how different injector pens affect: * how the study medicine (called Genotropin) is delivered into the body and * how the study medicine is taken up into the blood in healthy adults. The study is seeking participants who are: * Aged 18 to 60 years old * Male or female who are healthy as determined by medical assessment * Body-mass index (BMI) of 16 to 32, and a total body weight more than 45 kg. BMI is a way to estimate a healthy body weight for an adult's height. Adults in this study will receive study medicine by a shot under the skin. The study medicine will be given using 2 different injector pens which are medical devices that give a shot under the skin. Blood samples will be taken before and after the shots to look for the study medicine. We will compare the amount of study medicine in the blood between shots from the 2 injector pens. Adults will take part in this study for about 10 weeks including the screening period. They will have to stay at the study clinic for at least 13 days. This includes 2 study periods in total. A follow up phone call will be made 23 to 30 days following the last study period.

Interventions

DEVICEMarketed Genotropin Pen 12

Growth Hormone Delivery Device for use with Somatropin for injection

DEVICENew Genotropin Injector Pen

Growth Hormone Delivery Device for use with Somatropin for injection

DRUGGenotropin 4mg

4mg subcutaneous

Sponsors

Pfizer
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
CROSSOVER
Primary purpose
BASIC_SCIENCE
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
18 Years to 60 Years
Healthy volunteers
Yes

Inclusion criteria

* Healthy Participants * BMI 16 to 32 kg/m2 * body weight more than 45kg

Exclusion criteria

* Ongoing or past history of significant medical conditions * Use of prescription or non prescription medications within 14 days of first study dose * Previous exposure to growth hormone * History of alcohol abuse, binge drinking or illicit drug use

Design outcomes

Primary

MeasureTime frameDescription
Area Under the Concentration-time Curve From Time Zero Extrapolated to Infinity (AUCinf) of SomatropinAt pre-dose -24, -18, -12, -8, 0 and 1, 2, 3, 4, 6, 8, 10, 12, 16 and 24 hours post-dose on day 1 of each periodAUCinf = Area under the plasma concentration versus time curve (AUC) from time zero (pre-dose) to extrapolated infinite time (0-inf). It is obtained from AUC (0-t) plus AUC (t-inf).
Maximum Observed Plasma Concentration (Cmax) for SomatropinAt pre-dose -24, -18, -12, -8, 0 and 1, 2, 3, 4, 6, 8, 10, 12, 16 and 24 hours post-dose on day 1 of each period

Secondary

MeasureTime frameDescription
Number of Participants With Treatment Emergent Adverse EventsFrom start of study treatment up to 28-35 days after last dose of study treatment (41 days)
Number of Participants With Clinical Laboratory AbnormalitiesUp to Day 11
Area under the effect-time curve from 0 to time of last measurable concentration (AUEClast)At pre-dose and 6, 12, 24, 48, 72 and 96 hours post-dose on day 1 of each periodArea under the effect-time curve to the last observed time point of Serum IGF-1
Maximum observed effect (Emax)At pre-dose and 6, 12, 24, 48, 72 and 96 hours post-dose on day 1 of each periodMaximum observed effect of Serum IGF-1

Countries

Belgium

Contacts

STUDY_DIRECTORPfizer CT.gov Call Center

Pfizer

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Aug 11, 2026