The purpose of this study is to evaluate changes in vascular parameters in subjects receiving Testopel 75mg (one time) versus subjects receiving Compounded Testosterone pellets 100mg (one time) versus subjects receiving Compounded Testosterone pellets 200mg (one time) to participant with clinical hypogonadism.

Hypogonadism, or low testosterone (Low T), is the deficiency in producing testosterone by the testes. Testosterone pellets is a long-acting formulation of Testosterone Replacement Therapy (TRT) that is delivered subcutaneously to men diagnosed with low T. Advantages to subcutaneous testosterone pellets include ease of delivery and decreased risk of the medication being transfer upon skin contact to woman or children. Long acting testosterone replacement Implantation of six to ≥10 testosterone pellets (450 to ≥750 mg) increased total testosterone into the therapeutic range at 1 month post-implantation and sustained therapeutic levels (>300) for 4-6 months.

Participants will be randomly assigned to 1 of 3 study groups. In one of the groups the treatment will include implantation of Testopel ® 750mg (10 pellets with 75mg pellet) one time, in the second group, treatment will include compounded subcutaneous testosterone 800mg (8 pellets with 100mg pellet) one time and in the third group, treatment will include compounded subcutaneous testosterone 800mg (4 pellets with 200mg pellet) one time.

The treatment takes approximately 30 minutes and will include: Clean and numb the insertion site with lidocaine at 1%, followed by small incision in the skin, implantation of pellets into subdermal fat layer and sealing the incision with Steri-strip. This is the current standard of care of Testopel insertion and same procedure will be followed with both compounded and commercial pellets.

Inclusion Criteria:

• Voluntarily sign and date the study consent form(s), which have been approved by an Institutional Review Board (IRB). Written consent must be obtained prior to the initiation of any study procedures.
• Male between 18 and 75 years of age.
• Documented diagnosis of primary hypogonadism (congenital or acquired) or hypogonadotropic hypogonadism (congenital or acquired).
• Serum total testosterone < 300 ng/dL on 2 measurements
• Naïve to androgen replacement or has discontinued current treatment and completed a washout of 4 weeks following androgen treatment.
• Judged to be in good general health as determined by the principal investigator based upon the results of a medical history, physical examination, vital signs, laboratory profile and a 12-lead electrocardiogram (ECG).

Exclusion Criteria:

• History of significant sensitivity or allergy to androgens, or product excipients.

• Clinically significant findings in the pre-study examinations including abnormal breast examination requiring follow-up, abnormal ECG.

• Abnormal prostate digital rectal examination (DRE) with palpable nodule(s) or International Prostate Symptom Score (I-PSS) score > 19 points.

• Body mass index (BMI) ≥ 40 kg/m2.

• Clinically significant abnormal laboratory value, in the opinion of the investigator, in serum chemistry, hematology, or urinalysis including but not limited to:

  1. Baseline hemoglobin > 16 g/dL
  2. Hematocrit < 35% or > 50%
  3. prostate-specific antigen (PSA) > 4 ng/mL

• History of seizures or convulsions, including febrile, alcohol or drug withdrawal seizures.

• History of any clinically significant illness, infection, or surgical procedure within 4 weeks prior to study drug administration.

• History of stroke or myocardial infarction within the past 5 years.

• History of, or current or suspected, prostate or breast cancer.

• History of diagnosed, severe, untreated, obstructive sleep apnea.

• History of abuse of alcohol or any drug substance in the opinion of the investigator within the previous 2 years.

• Donation or loss of 550 mL or more blood volume (including plasmapheresis) or receipt of a transfusion of any blood product within 12 weeks prior to the start of treatment.

• Inadequate venous access for collection of serial blood samples required for pharmacokinetic profiles.

• Receipt of any investigational product within 4 weeks or within 5 half-lives prior to the start of treatment.

• Inability to understand and provide written informed consent for the study.

No subjects were enrolled to the 200mg group due to complications with the compounding pharmacies ability to produce the medication.

Adverse events were evaluated after implantation, and at each follow up visit (months 2, 4, and 6).

zero subjects were enrolled to the 200mg treatment arm.