Effects of TAK-448 in Middle-aged and Older Men With Low Testosterone

Exclusion Criteria

• •1. Has uncontrolled, clinically significant neurologic, cardiovascular, pulmonary, hepatic, renal, metabolic, gastrointestinal, or endocrine disease or other abnormality that may impact the ability of the participant to participate or potentially confound the study results. Participants will be excluded based on:
• •1. Has a serum creatinine \>2.0 milligrams per deciliter (mg/dL) at Screening.
• •2. Is receiving dialysis treatment.
• •3. Has an American Urological Association (AUA)/ International Prostate Symptom Score (I-PSS) score of \>19 or serum prostate-specific antigen (PSA) \>4 nanogram per milliliter (ng/mL) at Screening.
• •4. Has thyrotropin (TSH) levels less than (\<) 0.3 or \>7.5 milli-international units per liter (mIU/L) at Screening.
• •5. Has systolic blood pressure \>160 millimeter of mercury (mm Hg) or diastolic blood pressure \>100 mm Hg (if out of range may be repeated once for eligibility determination) at Screening.
• •6. Has luteinizing hormone (LH) \>9.4 units per liter (U/L) at Screening.
• •7. Is receiving insulin therapy.
• •8. Has a hematocrit \<30 percent (%) or \>48% at Screening.
• •9. Has a glycosylated hemoglobin (HbA1c) \>8.0 at Screening (Cohort 1).
• •2. Has type 2 diabetes mellitus defined as fasting blood glucose \>125 mg/dL, glycosylated hemoglobin (HbA1c) \>6.2%, or use of antidiabetic medication (Cohort 2 only).
• •3. Has clinical evidence of anatomic or pathological hypothalamic/pituitary/testicular disease, such as (but not limited to) Klinefelter's syndrome, Kallmann's syndrome, systemic infiltrative diseases (hemochromatosis, sarcoidosis, Wilson's disease), or prior pituitary surgery.
• •4. Has used gonadotropin-releasing hormone (GnRH) agonists, GnRH antagonists, antiandrogens, clomiphene, or other reproductive hormone-related agents within 6 months prior to Screening.
• •5. Has used anabolic therapies (testosterone, dehydroepiandrosterone \[DHEA\], androstendione, any other androgen, or recombinant human growth hormone) within 1 year of Screening.