Steady-State Feedback Actions of Testosterone on Luteinizing Hormone Secretion in Young and Older Men

• Status: Completed
• Trial end date: 2007-12-01
• Target enrollment: 0
• Participant gender: Male

Summary

This study is being done to learn how the male hormone , testosterone, affects pituitary hormones in younger and older men. The pituitary is a gland in the brain that secretes hormones, some of which normally control growth and fertility.

• Phase: Phase 1
• Accepts Healthy Volunteers?: Accepts Healthy Volunteers

Details

• Lead Sponsor: Mayo Clinic
• Collaborator: National Institutes of Health (NIH)
• Treatments: Hormones; Ketoconazole; Methyltestosterone; Testosterone; Testosterone 17 beta-cypionate; Testosterone enanthate; Testosterone undecanoate

Criteria

• Healthy Men Ages 18-80

• All ethnicities eligible

• Men with indeterminate erectile dysfunction eligible with normal serum gonadotropin, total testosterone, prolactin and TSH concentrations and documented integrity of the neurovascular, cardiovascular, hepatorenal systems