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Metformin Suspension and Insulin Sensitivity

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00437333
Recruitment Status : Completed
First Posted : February 21, 2007
Last Update Posted : February 21, 2007
Information provided by:
University Magna Graecia

Brief Summary:

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.

Condition or disease Intervention/treatment Phase
Polycystic Ovary Syndrome Drug: Metformin cloridrate Phase 4

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.

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Study Type : Interventional  (Clinical Trial)
Enrollment : 30 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double
Primary Purpose: Treatment
Official Title: Insulin Sensitivity After Metformin Suspension in Normal-Weight Women With Polycystic Ovary Syndrome
Study Start Date : December 2003
Study Completion Date : April 2006

Resource links provided by the National Library of Medicine

Primary Outcome Measures :
  1. Insulin sensitivity by euglycemic hyperinsulinemic clamp

Secondary Outcome Measures :
  1. Clinical, hormonal, and metabolic assessments

Information from the National Library of Medicine

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Ages Eligible for Study:   20 Years to 30 Years   (Adult)
Sexes Eligible for Study:   Female
Accepts Healthy Volunteers:   No

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.

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT00437333

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"Pugliese" Hospital
Catanzaro, Italy, 88100
Sponsors and Collaborators
University Magna Graecia
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Principal Investigator: Stefano Palomba, MD Department of Obstetrics and Gynecology, University "Magna Graecia" of Catanzaro

Layout table for additonal information Identifier: NCT00437333     History of Changes
Other Study ID Numbers: MM-187-2004
Prot. 2004063411_003
First Posted: February 21, 2007    Key Record Dates
Last Update Posted: February 21, 2007
Last Verified: February 2007

Keywords provided by University Magna Graecia:
Insulin sensitivity
Insulin-sensitizing drug

Additional relevant MeSH terms:
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Polycystic Ovary Syndrome
Insulin Resistance
Pathologic Processes
Immune System Diseases
Ovarian Cysts
Ovarian Diseases
Adnexal Diseases
Genital Diseases, Female
Gonadal Disorders
Endocrine System Diseases
Glucose Metabolism Disorders
Metabolic Diseases
Insulin, Globin Zinc
Hypoglycemic Agents
Physiological Effects of Drugs