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Anastrozole Administration in Elderly Hypogonadal Men

This study has been completed.
National Institute on Aging (NIA)
Information provided by (Responsible Party):
Benjamin Leder, MD, Massachusetts General Hospital Identifier:
First received: August 25, 2005
Last updated: November 30, 2016
Last verified: November 2016
The purpose of the study is to assess the effects of sustained aromatase inhibitor therapy to reduce estrogen levels in elderly men with mild hypogonadism (a decreased level of sex hormones).

Condition Intervention Phase
Drug: anastrozole
Phase 2

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double Blind (Participant, Investigator, Outcomes Assessor)
Primary Purpose: Treatment
Official Title: Anastrozole Administration in Elderly Hypogonadal Men

Resource links provided by NLM:

Further study details as provided by Benjamin Leder, MD, Massachusetts General Hospital:

Primary Outcome Measures:
  • Lean Body Mass [ Time Frame: 1 year ]

Enrollment: 100
Study Start Date: October 2004
Study Completion Date: October 2009
Primary Completion Date: October 2008 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: anastrozole
Drug: anastrozole
1 mg QD
Other Name: arimidex
Placebo Comparator: placebo
Drug: anastrozole
1 mg QD
Other Name: arimidex

Detailed Description:

It has long been accepted that aging in men is associated with a slow, steady decline in gonadal androgen (male sex hormone) production. Several studies have explored androgen replacement, but the safety and efficacy of testosterone administration remains controversial. Aromatase inhibitors may provide a particularly useful way to restore normal androgen production in aging men.

This study will recruit 150 male volunteers, 60 years of age or older, to be randomized to receive either anastrozole or a placebo for 24 months. Six visits are planned over the 96-week treatment period.


Ages Eligible for Study:   60 Years and older   (Adult, Senior)
Sexes Eligible for Study:   Male
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Men ages 60 and older
  • Serum testosterone between 150-300 ng/dL
  • Symptoms suggestive of androgen deficiency
  Contacts and Locations
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Please refer to this study by its identifier: NCT00136695

United States, Massachusetts
General Clinical Research Center, Massachusetts General Hospital
Boston, Massachusetts, United States, 02114
Sponsors and Collaborators
Massachusetts General Hospital
National Institute on Aging (NIA)
Principal Investigator: Benjamin Z. Leder, MD Massachusetts General Hospital
  More Information

Responsible Party: Benjamin Leder, MD, Principal Invesitgator (MD), Massachusetts General Hospital Identifier: NCT00136695     History of Changes
Other Study ID Numbers: AG0035
5R01AG025099-05 ( US NIH Grant/Contract Award Number )
Study First Received: August 25, 2005
Results First Received: November 30, 2016
Last Updated: November 30, 2016

Keywords provided by Benjamin Leder, MD, Massachusetts General Hospital:

Additional relevant MeSH terms:
Gonadal Disorders
Endocrine System Diseases
Antineoplastic Agents, Hormonal
Antineoplastic Agents
Aromatase Inhibitors
Steroid Synthesis Inhibitors
Enzyme Inhibitors
Molecular Mechanisms of Pharmacological Action
Estrogen Antagonists
Hormone Antagonists
Hormones, Hormone Substitutes, and Hormone Antagonists
Physiological Effects of Drugs processed this record on May 25, 2017