ClinicalTrials.Veeva

Menu

Short-term Effects of Aromatase Inhibition in Obese Men

R

Rijnstate Hospital

Status and phase

Completed
Phase 3

Conditions

Obesity
Hypogonadotrophic Hypogonadism

Treatments

Drug: Letrozole (Femara)

Study type

Interventional

Funder types

Other

Identifiers

NCT00138710
LTC-323-150405

Details and patient eligibility

About

In this study, 50 obese men with a hormonal imbalance will be treated with letrozole or placebo for six months in order to examine the effects on the hormonal balance, and on weight loss. The study will also address the side effects and psychological effects of letrozole as compared to placebo.

Full description

The aim of the study is to establish the short-term efficacy and safety of aromatase inhibition in restoring and maintaining eugonadism in hypogonadotrophic hypogonadal men. Secondary aim is to detect the short-term somatic and psychological effects.

Study design: Double blind randomized placebo-controlled trial.

Treatment: 26 weeks of either letrozole or placebo. All patients will start on 1 tablet per week, dose adjustments will be performed if serum testosterone or estradiol are outside the target range. All men will be prescribed a mildly hypocaloric diet.

Endpoints: BMI, body weight, waist circumference, body composition, exercise capacity, serum levels of several hormone markers, glucose tolerance, psychological characteristics.

All patients will be measured 6 times during the study.

Enrollment

50 estimated patients

Sex

Male

Ages

20 to 50 years old

Volunteers

No Healthy Volunteers

Inclusion criteria

  • BMI between 35 and 50
  • Male sex
  • Ages between 20 and 50
  • Serum total testosterone under 10 nmol/l
  • Serum luteinizing hormone (LH) under 9 mU/l
  • Serum estradiol over 40 pmol/l

Exclusion criteria

  • Comorbidity
  • Serum prostate-specific antigen (PSA) over 4.0 U/l
  • Discontinuation of smoking less than six months ago
  • Medication known to affect hormonal parameters

Trial design

Primary purpose

Treatment

Allocation

Randomized

Interventional model

Parallel Assignment

Masking

Double Blind

Trial contacts and locations

1

Loading...

Data sourced from clinicaltrials.gov

Clinical trials

Find clinical trialsTrials by location
© Copyright 2026 Veeva Systems