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Viagra for the Treatment of IUGR

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: NCT00347867
Recruitment Status : Unknown
Verified June 2006 by Rambam Health Care Campus.
Recruitment status was:  Not yet recruiting
First Posted : July 4, 2006
Last Update Posted : July 4, 2006
Information provided by:
Rambam Health Care Campus

Brief Summary:
It has been suggested that Viagra (or other drugs that inhibit PDE-5, the enzyme that normally inhibits blood vessels’ ability to expand) may have beneficial effects in hypertensive pregnancy and, possibly, preeclampsia.The benefits of Viagra were observed without any reduction in maternal blood pressure, thereby dissociating hypertension per se from the loss of NO (nitrous oxide) signaling in the uterine circulation.Following publications, suggesting that sildenafil citrate used as a therapeutic agent may improve myometrial perfusion in IUGR gestations by promoting myometrial small artery vasodilatation, decreasing peripheral resistance and increasing flow within the uteroplacental bed, we intend to administer this medication to parturients where intauterine growth restriction and pregnancy associated hypertension have been diagnosed in an attempt to induce vasodilatation and improved uteroplacental perfusion resulting in improved fetal growth.

Condition or disease Intervention/treatment Phase
IUGR Drug: Viagra administration in IUGR/PET pregnancies Phase 4

Detailed Description:
Each participant will receive, after informed consent a 25 mg tablet of Viagra [sildenafil citrate ]orally. The uteroplacental perfusion will be measured using transvaginal and transabdominal ultrasound Doppler velocimetry studies, before and after 2, 4, and 24 hours of Viagra ingestion. If no significant side effects are recorded, the protocol will be repeated , 48 hours after the first tablet ingestion, but using 50 mg Viagra.In cases of positive and encouraging results and if no serious side effects are detected we shall consider repeated administration of the lowest effcetive dose of viagra in an attempt to prevent prematurity and possibly reach term.our study will evaluate the effects of Viagra on uterine blood flow changes during pregnancy, and possible changes in other systems that contribute to normal fetal growth and development, in parallel to monitoring general and possible deleterious effects on the retina or other possible maternal or fetal organs.

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Study Type : Interventional  (Clinical Trial)
Enrollment : 20 participants
Allocation: Non-Randomized
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: Improvement of Utero-Placental Perfusion and Fetal Growth in IUGR and PET by Administration of Sildenafil Citrate in Pregnancy
Study Start Date : July 2006

Resource links provided by the National Library of Medicine

Primary Outcome Measures :
  1. Uteroplacental perfusion
  2. Fetal growth
  3. Maternal and fetal safety

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years to 40 Years   (Adult)
Sexes Eligible for Study:   Female
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • IUGR/PET/Pregnancy weeks 24-33.
  • Informed consent.

Exclusion Criteria:

  • Maternal cardiovascular morbidity.
  • Usage of any vasodilator medication
  • Smoking
  • Diabetes

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): NCT00347867

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Contact: Zeev Blumenfeld, MD 972-4-8542577

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RAMBAM Health Care Campus
Haifa, Israel, 31096
Contact: Zeev Blumenfeld, MD    972-4-8542577   
Principal Investigator: Zeev Blumenfeld, MD         
Sponsors and Collaborators
Rambam Health Care Campus
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Principal Investigator: Zeev Blumenfeld, MD RAMBAM Health Care Campus, Technion

Layout table for additonal information Identifier: NCT00347867    
Other Study ID Numbers: Viagra.CTIL
First Posted: July 4, 2006    Key Record Dates
Last Update Posted: July 4, 2006
Last Verified: June 2006
Keywords provided by Rambam Health Care Campus:
Sildenafil citrate
Additional relevant MeSH terms:
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Fetal Growth Retardation
Fetal Diseases
Pregnancy Complications
Growth Disorders
Pathologic Processes
Sildenafil Citrate
Molecular Mechanisms of Pharmacological Action
Vasodilator Agents
Phosphodiesterase 5 Inhibitors
Phosphodiesterase Inhibitors
Enzyme Inhibitors
Urological Agents