Metformin Suspension and Insulin Sensitivity

February 20, 2007 updated by: University Magna Graecia

Insulin Sensitivity After Metformin Suspension in Normal-Weight Women With Polycystic Ovary Syndrome

Metformin is an insulin sensitizing drug routinely used for the treatment of anovulatory patients with polycystic ovary syndrome (PCOS). To date, the metabolic effects of the long-term metformin administration are know but no data are available on the effects after its suspension.

The purpose of this study is to evaluate the effects of metformin suspension on insulin sensitivity in PCOS patients.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

Thirty young normal-weight anovulatory PCOS women will be enrolled. The diagnosis of PCOS will be based on the presence of clinical [Ferriman-Gallwey score ≥ 8] or biochemical hyperandrogenism (serum testosterone levels (>2 SD above our reference mean values) and chronic anovulation [serum luteal progesterone (P) below 2 ng/mL)].

Patients will be randomly allocated into two groups (metformin and placebo group) using a computer-software. Fifteen PCOS patients will be treated with metformin at a dosage of 1700 mg daily (one tablet of 850 mg twice daily; metformin group), whereas other 15 PCOS will be treated with placebo tables (one tablet twice daily; placebo group). The duration of the treatment will be 12 months. Patients will be instructed to follow their usual diet and physical activity, and to use barrier contraception throughout the study. The length and the frequency of the menstrual cycles, and the adverse experiences (AEs) will be reported on a daily diary.

Each subject will undergo follow-up visits under (at six and 12 months from treatment starting) and after treatment (at six and 12 months from treatment withdrawal). At each follow-up visit, in all subjects the same operator will perform clinical, hormonal, metabolic, and insulin sensitivity assessments by euglycemic hyperinsulinemic clamp.

Study Type

Interventional

Enrollment

30

Phase

  • Phase 4

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Italy
      • Catanzaro, Italy, 88100
        • "Pugliese" Hospital

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

20 years to 30 years (Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

Female

Description

Inclusion Criteria:

  • Polycystic ovary syndrome (using NIH criteria).

Exclusion Criteria:

  • Age <20 or >30 years;
  • BMI higher than 25 and lower than 18;
  • Neoplastic, metabolic, hepatic, and cardiovascular disorders or other concurrent medical illnesses;
  • Hypothyroidism, hyperprolactinemia, Cushing's syndrome, and non-classical congenital adrenal hyperplasia;
  • Current or previous use of oral contraceptives, glucocorticoids, antiandrogens, ovulation induction agents, antidiabetic and anti-obesity drugs or other hormonal drugs;
  • Intention to start a diet or a specific program of physical activity.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Double

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Insulin sensitivity by euglycemic hyperinsulinemic clamp

Secondary Outcome Measures

Outcome Measure
Clinical, hormonal, and metabolic assessments

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

University Magna Graecia

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

December 1, 2003

Study Completion

April 1, 2006

Study Registration Dates

First Submitted

February 20, 2007

First Submitted That Met QC Criteria

February 20, 2007

First Posted (Estimate)

February 21, 2007

Study Record Updates

Last Update Posted (Estimate)

February 21, 2007

Last Update Submitted That Met QC Criteria

February 20, 2007

Last Verified

February 1, 2007

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • MM-187-2004
  • Prot. 2004063411_003

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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