The Effect of Various Amounts of Fat on PK of Oral Testosterone Undecanoate

This is a Phase 2, open-label, randomized, cross over, pharmacokinetic study. Subjects will
initially be dosed for 2 weeks (Run-In Phase) to allow suppression of endogenous testosterone
production, while allowing the oral TU to reach steady state. The subjects will then be
confined to a clinical unit in which they undergo the PK Phase of the study. During the PK
Phase of the study, subjects will undergo a five-period cross-over in which oral TU is dosed
twice daily. Subjects will dose in the morning and in the evening immediately prior to
protocol-defined meals. The protocol-defined breakfasts will contain various levels of fat
including 15 g, 30 g, 45 g, a breakfast consistent with the fat and calorie content of the
high-fat breakfast consistent with recommendations in the Guidance for Industry on
Food-Effect Bioavailability and Fed Bioequivalence Studies (December 2002), or while fasting
(with no meal until 4 hours post-dose). Subjects will be randomized to a designated sequence
of the protocol-defined breakfasts, or the fasted state. The subjects will be required to
consume the entire breakfast within 20 minutes during the PK Phase. The protocol-defined
evening meal will be required to be consumed within 20 minutes. The 5 meal periods will occur
on sequential days.

Approximately twenty (20) subjects will be enrolled in order to ensure completion of 16
subjects.

Inclusion Criteria:

1. Man 18 to 65 years of age, inclusive, with a clinical diagnosis of hypogonadism
(signs/symptoms consistent with hypogonadism for testosterone naïve subjects and
history of signs/symptoms for subjects who have received prior treatment) as well as
testosterone levels consistent with hypogonadism as defined by 2 morning total T
values of <300 ng/dL (between 6:00 and 10:00 AM drawn on 2 separate days
[approximately 7 (±2) days apart].

2. Adequate venous access in the left or right arm to allow collection of a number of
blood samples via a venous cannula.

3. Must be naïve to androgen-replacement therapy or washed out of prior androgen
replacement therapies; that is, be willing to cease current T treatment or currently
not be taking T treatment, (washout durations specified in exclusion criterion #1).
Subjects must remain off all forms of T, except for dispensed study drug, throughout
the entire study.

4. Subjects on replacement therapy for hypopituitarism or multiple endocrine deficiencies
must be on stable doses of thyroid hormone and adrenal replacement hormones for at
least 14 days before Screen 1.

5. Has voluntarily given written informed consent to participate in this study.

Exclusion Criteria:

1. Received oral topical (eg, gel or patch), intranasal, or buccal T therapy within the
previous 2 weeks, intramuscular T injection of short-acting duration (eg, T enanthate,
T cypionate) within the previous 4 weeks, intramuscular T injection of long-acting
duration (eg, AVEED) within the previous 20 weeks, or T implantable pellets
(Testopel®) within the previous 6 months.

2. Has an intercurrent disease deemed clinically significant in the opinion of the
investigator of any type; in particular, liver, kidney, uncontrolled or poorly
controlled heart disease, including hypertension, congestive heart failure or coronary
heart disease, or psychiatric-illness, including severe depression.

3. Has had a recent (within 2 years) history of stroke, transient ischemic attack, or
acute coronary event.

4. Has a mean of the triplicate assessment of sBP > 150 mm Hg and/or dBP > 90 mm Hg at
screening (if prescribed antihypertensives, subject should be taking medications on
the day of the screening visit with a sip of water). Subjects < 60 years of age and
prescribed antihypertensives will be excluded if the mean of the triplicate assessment
of sBP > 140 mm Hg and/or dBP > 90 mm Hg at screening.

5. Has had recent (within 2 years) history of angina or stent (coronary or carotid)
placement.

6. Has untreated, severe obstructive sleep apnea.

7. Has clinically significant abnormal laboratory values, including serum transaminases >
2 × upper limits of normal (ULN), serum bilirubin > 1.5 × ULN and serum creatinine >
1.5 × ULN.

8. Has a hematocrit (HCT) value of < 35% or > 48%.

9. Has a history of polycythemia, either idiopathic or associated with TRT treatment.

10. Is a diabetic subject with a glycosylated hemoglobin > 8.5%.

11. Has a body mass index (BMI) ≥ 38 kg/m2.

12. Has been on stable doses of antihypertensive medication for < 3 months.

13. Has an abnormal prostate digital rectal examination [(DRE); palpable nodules],
elevated PSA (serum PSA > 4.0 ng/mL), I-PSS > 19 points at screening, and/or history
of, or current or suspected, prostate cancer.

14. Has a history of, or current or suspected, breast cancer.

15. Has a history of abnormal bleeding tendencies or thrombophlebitis unrelated to
venipuncture or intravenous cannulation within the previous 2 years.

16. Use of dietary supplements such as saw palmetto or phytoestrogens and any dietary
supplements that may increase total T, such as androstenedione or
dehydroepiandrosterone within the previous 4 weeks.

17. Has known malabsorption syndrome and/or current treatment with oral lipase inhibitors
(eg, orlistat [Xenical®]) and/or bile acid-binding resins (eg, cholestyramine
[Questran®], colestipol [Colestid®]) or treatments that promote gastric emptying (eg,
metoclopramide [Reglan®]).

18. Inability to observe all rules and smoking restrictions in place at the clinical
facility during confinement.

19. Has history of abuse of alcohol or any drug substance within the previous 2 years.

20. Poor compliance or unlikely to keep clinic appointments and remain for entire
confinement period.

21. Has received any drug as part of another research study within 30 days of initial dose
administration in this study.

22. Donated blood (≥ 500 mL) within the 12-week period before the initial study dose.

23. Current use of the following groups of drugs that effect T levels, T metabolism or
levels of T metabolites, namely antiandrogens, 5-alpha-reductase inhibitors (eg,
dutasteride, finasteride), estrogens, long-acting opioid analgesics (eg, methadone
hydrochloride, buprenorphine hydrochloride) or human growth hormone (HGH).

24. Unwilling or unable to follow the dietary requirements for this study.