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Testosterone Cypionate

Phase 3

Male Hypogonadism | Small molecule | Endocrine |Amneal Pharmaceuticals, Inc.|Trials Updated: Oct 27, 2026

Testosterone Cypionate development status

Highest phase Phase 3
Registered trials 6 across 3 sponsors since Apr 2020

Testosterone Cypionate target and mechanism

Molecular targetAR
Target classAgonist
ModalitySmall molecule

Success Probability

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Market & Valuation

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Trial Design

Double-BlindCONTROLLED
Total Trials1
Total Enrollment190

FDA Designations

No designations recorded

Testosterone Cypionate clinical trials

Testosterone Cypionate · 1 trial · 1 indication

Phase 3 1
NCT07898072Safety and Efficacy of Weekly Testosterone Cypionate Auto-Injector in Men With HypogonadismMale Hypogonadism
RECRUITING190 Analytics
PHASE3RECRUITING
Safety and Efficacy of Weekly Testosterone Cypionate Auto-Injector in Men With Hypogonadism
Male HypogonadismUnlock trial analytics

Study Endpoints

Primary Endpoints

Percentage of Participants With Average Serum Total Testosterone Concentration Within 300-1100 ng/dL at Week 12
Week 12 (over the 168-hour dosing interval following the Week 12 dose)

The percentage of participants whose average serum total testosterone concentration (Cavg) over the 168-hour (7-day) dosing interval at Week 12 is within the predefined range of 300-1100 ng/dL. Serum total testosterone concentrations will be measured using blood samples collected before and at specified time points after dosing through 168 hours. Cavg will be calculated by dividing the area under the serum concentration-time curve from 0 to 168 hours (AUC0-168h) by 168 hours. The primary efficacy criterion is met if at least 75% of participants achieve the specified range, with the lower bound of the two-sided 95% confidence interval at least 65%. The assessment will be based on the protocol-defined full pharmacokinetic population.

Secondary Endpoints

Percentage of Participants With Maximum Serum Total Testosterone Concentration (Cmax) Below 1500 ng/dL at Week 12
Week 12 (0-168 hours after dosing)
Percentage of Participants With Maximum Serum Total Testosterone Concentration (Cmax) Between 1800 and 2500 ng/dL at Week 12
Week 12 (0-168 hours after dosing)
Number of Participants With Maximum Serum Total Testosterone Concentration (Cmax) Above 2500 ng/dL at Week 12
Week 12 (0-168 hours after dosing)
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Study Design & Arms

AllocationNA
MaskingDOUBLE
ModelSINGLE_GROUP
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Testosterone Cypionate Auto-Injector (75 mg)EXPERIMENTALParticipants with hypogonadism will receive testosterone cypionate injection administered subcutaneously into the abdomen once weekly using an auto-injector. All participants will initiate treatment at 75 mg once weekly.
Testosterone Cypionate Auto-Injector (50 mg)EXPERIMENTALParticipants with hypogonadism will receive testosterone cypionate injection administered subcutaneously into the abdomen once weekly using an auto-injector. All participants will initiate treatment at 75 mg once weekly. The dose may be adjusted to 50 mg based on serum total testosterone trough concentrations and protocol-defined dose titration criteria.
Testosterone Cypionate Auto-Injector (100 mg)EXPERIMENTALParticipants with hypogonadism will receive testosterone cypionate injection administered subcutaneously into the abdomen once weekly using an auto-injector. All participants will initiate treatment at 75 mg once weekly. The dose may be adjusted to100 mg based on serum total testosterone trough concentrations and protocol-defined dose titration criteria. Treatment will continue through the 24-week primary evaluation period. Participants completing Week 24 may continue once-weekly treatment with ongoing safety assessments through Week 52. The first dose will be administered by designated study personnel, followed by participant self-administration as specified in the protocol.

Interventions

NameTypeDescription
Testosterone Cypionate 75 mgDRUGTestosterone cypionate injectable solution formulated in cottonseed oil, supplied in a single-use auto-injector containing 75 mg/0.5 mL. The study drug will be administered subcutaneously into the abdomen once weekly. All participants will initiate treatment at 75 mg once weekly, with dose adjustments in 25 mg increments to 50 mg or 100 mg based on serum total testosterone trough concentrations according to protocol-defined criteria. Treatment will continue through the 24-week primary evaluation period, with eligible participants permitted to continue once-weekly treatment through Week 52 for extended safety assessment.
Testosterone cypionate 50 mgDRUGTestosterone cypionate injectable solution formulated in cottonseed oil, supplied in a single-use auto-injector containing 50 mg/0.5 mL. The study drug will be administered subcutaneously into the abdomen once weekly. All participants will initiate treatment at 75 mg once weekly, with dose adjustments in 25 mg increments to 50 mg or 100 mg based on serum total testosterone trough concentrations according to protocol-defined criteria. Treatment will continue through the 24-week primary evaluation period, with eligible participants permitted to continue once-weekly treatment through Week 52 for extended safety assessment.
Testosterone cypionate 100 mgDRUGTestosterone cypionate injectable solution formulated in cottonseed oil, supplied in a single-use auto-injector containing 100 mg/0.5 mL. The study drug will be administered subcutaneously into the abdomen once weekly. All participants will initiate treatment at 75 mg once weekly, with dose adjustments in 25 mg increments to 50 mg or 100 mg based on serum total testosterone trough concentrations according to protocol-defined criteria. Treatment will continue through the 24-week primary evaluation period, with eligible participants permitted to continue once-weekly treatment through Week 52 for extended safety assessment.
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Eligibility Criteria

Age Range18 Years to 75 Years
SexMALE
Healthy VolunteersNo
Study Sites10

Inclusion Criteria: * Adults assigned male at birth, aged 18 to 75 years. * Documented diagnosis of hypogonadism (low testosterone) with at least one associated symptom, such as reduced sexual desire, erectile dysfunction, fatigue, reduced energy, loss of muscle mass, decreased body hair, or mood c...

Countries:United States
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Competitive Landscape -Hypogonadism 3 trials (matched to "Male Hypogonadism")

Recent Changes (Last 90 Days)

LOWOct 27, 2026NCT07898072NEW_TRIAL: changed
LOWOct 27, 2026NCT07898072NEW_TRIAL: changed