Title

Pilot Pharmacokinetic Study of Oral Testosterone Ester Formulations in Hypogonadal Men
Phase IIa, Pilot, Pharmacokinetic Study of Oral Testosterone Ester Formulations in Hypogonadal Men
  • Phase

    Phase 2
  • Study Type

    Interventional
  • Intervention/Treatment

    testosterone ...
  • Study Participants

    12
Determine the serum pharmacokinetic profile for two oral formulations of T-esters (one TE and one TU) administered once -(QD) and twice-daily (BID) to hypogonadal men.
Five period cross-over study in which subjects received a single day of dosing in each period. Dosing was either QD or BID with one of two T esters (T-enanthate (TE) or T-undecanoate (TU)). Dosing was within 5 minutes of meals (breakfast and for BID dosing dinner). There was a minimum of a 5-day washout between periods. Subjects were hypogonadal men.
Study Started
Nov 30
2007
Primary Completion
Apr 30
2008
Study Completion
Apr 30
2008
Results Posted
Nov 01
2018
Last Update
Nov 01
2018

Drug Testosterone undecanoate

Single-day dose as QD or BID for 3 of 5 crossover periods

  • Other names: TU

Drug Testosterone enanthate

Single-day dose for 2 of 5 crossover periods

  • Other names: TE

Testosterone undecanoate Experimental

Period 2 - 200 mg T (as TU) QD Period 3 - 200 mg T (as TU) BID (100 mg/dose) Period 4 - 400 mg T (as TU) BID (200 mg/dose)

Testosterone enanthate Active Comparator

Period 1 - 400 mg T (as TE) QD Period 5 - 800 mg T (as TE) BID (400 mg/dose)

Criteria

Inclusion Criteria:

Male, ages 18 to 65 Serum total testosterone less than or equal to 250 ng/dL Naive to androgen replacement therapy Subject must be on stable doses of thyroid or adrenal replacement hormones for at least 14 days prior to enrollment

Exclusion Criteria:

Significant intercurrent disease of any type, in particular, liver, kidney or heart disease, uncontrolled diabetes mellitus or psychiatric illness. Patients with treated hyperlipidemia will not be excluded provided they have been stable on their lipid-lowering mediation for at least three months. For non-insulin dependent diabetic subjects, HbA1c>9%.

Abnormal prostate digital rectal examination, elevated PSA (serum PSA >4ng/mL), AUA Sympton Score greater than or equal to 15 points, and a history or prostate cancer.

Serum transaminases >2X upper limit of normal (ULN) or serum bilirubin >2.0 mg/dL.

History of severe or multiple allergies, severe adverse drug reaction or leucopenia. Known hypersensitivity to lidocaine or all surgical dressings.

History of abnormal bleeding tendencies. Oral, topical, or buccal T therapy within the previous week, or intramuscular T injection within the previous 4 week.

Use of dietary supplements that may increase serum T, such as androstenedione or DHEA, within the previous 4 weeks.

Know malabsorption syndrome and/or current treatment with oral lipase inhibitors, bile acid-binding resins, colestipol, fibric acid derivatives, gemfibrozil, and probucol.

Smokers who are unable to refrain from smoking during confinement periods. History of, or current evidence of, abuse of alcohol or any drug substance. Poor compliers or those unlikely to attend. Receipt of any drug as part of a research study within 30 days of inital dose administration in this study.

Blood donation (usually 550 mL) within the 12-week period before the initial study dose.

Hematocrit less than 35%. Known clinical polycythemia or hematocrit greater than 50%. Current use of paroxetine and clomipramine, antiandrogens, estrogens, p450 enzyme inducers, or barbiturates.

History of sleep apnea.

Summary

Testosterone Enanthate 400 mg QD

Testosterone Undecanoate 200 mg QD

Testosterone Undecanoate 100 mg BID

Testosterone Undecanoate 200 mg BID

Testosterone Enanthate 400 mg BID

All Events

Event Type Organ System Event Term Testosterone Enanthate 400 mg QD Testosterone Undecanoate 200 mg QD Testosterone Undecanoate 100 mg BID Testosterone Undecanoate 200 mg BID Testosterone Enanthate 400 mg BID

Mean Serum Testosterone Cavg

The objective of the study was to determine the single day serum pharmacokinetic profile for two oral formulations of T-esters (one TE and one TU formulation) administered once- and twice-daily to hypogonadal men.

Testosterone Enanthate and Testosterone Undecanoate

TE Period 1 400 mg QD

293.0
ng/dL (Mean)
Standard Deviation: 148

TE Period 5 400 mg BID

316.0
ng/dL (Mean)
Standard Deviation: 167

TU Period 2 200 mg QD

246.0
ng/dL (Mean)
Standard Deviation: 77

TU Period 3 100 mg BID

281.0
ng/dL (Mean)
Standard Deviation: 89

TU Period 4 200 mg BID

385.0
ng/dL (Mean)
Standard Deviation: 132

Mean Serum Dihydrotestosterone Cmax

The objective of the study was to determine the single day serum pharmacokinetic profile for two oral formulations of T-esters (one TE and one TU formulation) administered once- and twice-daily to hypogonadal men.

Testosterone Enanthate and Testosterone Undecanoate

TE Period 1 400 mg QD

140.0
ng/dL (Mean)
Standard Deviation: 96

TE Period 5 400 mg BID

127.0
ng/dL (Mean)
Standard Deviation: 81

TU Period 2 200 mg QD

122.0
ng/dL (Mean)
Standard Deviation: 66

TU Period 3 100 mg BID

97.9
ng/dL (Mean)
Standard Deviation: 51.2

TU Period 4 200 mg BID

114.0
ng/dL (Mean)
Standard Deviation: 58

Age, Continuous

53
years (Mean)
Full Range: 31.0 to 68.0

Age, Categorical

Region of Enrollment

Sex: Female, Male

TE Period 1 - 400 mg QD

Testosterone Enanthate and Testosterone Undecanoate

TU Period 2 - 200 mg QD

Testosterone Enanthate and Testosterone Undecanoate

TU Period 3 - 200 mg BID

Testosterone Enanthate and Testosterone Undecanoate

TU Period 4 - 400 BID

Testosterone Enanthate and Testosterone Undecanoate

TE Period 5 - 800 mg BID

Testosterone Enanthate and Testosterone Undecanoate