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Generated: March 24, 2019

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CLINICAL TRIALS PROFILE FOR VIAGRA

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Clinical Trials for Viagra

Trial ID Title Status Sponsor Phase Summary
NCT00056433 Evaluation of Hydroxyurea Plus L-arginine or Sildenafil to Treat Sickle Cell Anemia Completed National Institutes of Health Clinical Center (CC) Phase 1 Patients with sickle cell disease have abnormal hemoglobin (the protein in red blood cells that carries oxygen to the body). This abnormality causes red blood cells to take on a sickle shape, producing disease symptoms. Fetal hemoglobin, a type of hemoglobin present in fetuses and babies, can prevent red cells from sickling. The drug hydroxyurea increases fetal hemoglobin production in patients with sickle cell disease by making a molecule called nitric oxide. The drugs L-arginine and Sildenafil (Viagra) increase the amount or the effect of nitric oxide. This study will evaluate: - The safety of giving L-arginine or Sildenafil together with hydroxyurea in patients with sickle cell disease; - The effectiveness of L-arginine plus hydroxyurea or Sildenafil plus hydroxyurea in increasing fetal hemoglobin in patients with sickle cell disease; and - The effectiveness of L-arginine plus hydroxyurea or Sildenafil and hydroxyurea in lowering blood pressure in the lungs of patients with sickle cell disease. (Pulmonary blood pressure is elevated in about one-third of patients with sickle cell disease, and this condition increases the risk of dying from the disease.) Patients with hemoglobin S-only, S-beta-thalassemia, or other sickle cell disease genotype may be eligible for this study. Before starting treatment, patients will have a complete medical history and physical examination. All patients will take hydroxyurea once a day every day by mouth for at least 2 months. They will be admitted to the NIH Clinical Center to take their first dose of hydroxyurea, and will have blood drawn through a catheter (plastic tube placed in a vein) every hour for 6 hours for tests to determine nitric oxide levels. After discharge, they will return to the clinic once every 2 weeks to check for treatment side effects and for blood tests to monitor hemoglobin and fetal hemoglobin levels. After fetal hemoglobin levels have been stable for 2 months, patients will be admitted to the Clinical Center for their first dose of L-arginine (for men) or Sildenafil (for women). Again, blood samples will be collected through a catheter once an hour for 6 hours. If there are no complications, patients will be discharged and will continue taking hydroxyurea once a day and L-arginine or Sildenafil three times a day for at least 3 months until fetal hemoglobin levels have been stable for at least 2 months. Patients will return to the clinic for blood tests every week for 2 weeks and then every 2 weeks to monitor hemoglobin and fetal hemoglobin levels and to check for treatment side effects. Patients will have eye examinations before and during treatment. Some patients with sickle cell disease develop abnormalities in the blood vessels of the eye. Also, Sildenafil can cause temporary changes in color vision. Rarely, more serious eye problems can occur, such as bleeding from the eye blood vessels or damage to the retina a layer of tissue that lines the back of the eye. Patients will also have an echocardiogram (ultrasound of the heart) before beginning treatment, after hydroxyurea treatment, and after 1 and 3 months of combined treatment with hydroxyurea and L-arginine or Sildenafil to help measure blood pressure in the lungs. Patients who develop complications from L-arginine or Sildenafil may continue in the study on hydroxyurea alone. Patients whose fetal hemoglobin levels increase with the combination therapy of hydroxyurea and L-arginine or Sildenafil may continue to take them.
NCT00090376 Evaluate the Effects of GPI 1485 on Erectile Function Following Bilateral Nerve-Sparing Prostatectomy Completed Symphony Neuro Development Company Phase 2 In this phase II study, an investigative (not approved by the FDA) drug called GPI 1485 is being assessed to see if it can help preserve erectile function after prostatectomy.
NCT00090376 Evaluate the Effects of GPI 1485 on Erectile Function Following Bilateral Nerve-Sparing Prostatectomy Completed Eisai Inc. Phase 2 In this phase II study, an investigative (not approved by the FDA) drug called GPI 1485 is being assessed to see if it can help preserve erectile function after prostatectomy.
NCT00104637 Sildenafil for Chronic Obstructive Pulmonary Disease Completed Pfizer Phase 2 The purpose of this study is to determine if sildenafil improves the exercise capacity and lung function of patients with chronic obstructive pulmonary disease.
Trial ID Title Status Sponsor Phase Summary

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Clinical Trial Conditions for Viagra

Condition Name

Condition Name for Viagra
Intervention Trials
Erectile Dysfunction 29
Impotence 17
Pulmonary Hypertension 6
Prostate Cancer 6
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Condition MeSH

Condition MeSH for Viagra
Intervention Trials
Erectile Dysfunction 46
Hypertension 23
Hypertension, Pulmonary 13
Heart Failure 6
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Clinical Trial Locations for Viagra

Trials by Country

Trials by Country for Viagra
Location Trials
United States 190
Canada 15
United Kingdom 12
Australia 10
Denmark 9
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Trials by US State

Trials by US State for Viagra
Location Trials
Texas 15
California 14
New York 12
Ohio 10
Connecticut 9
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Clinical Trial Progress for Viagra

Clinical Trial Phase

Clinical Trial Phase for Viagra
Clinical Trial Phase Trials
Phase 4 42
Phase 3 11
Phase 2/Phase 3 5
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Clinical Trial Status

Clinical Trial Status for Viagra
Clinical Trial Phase Trials
Completed 76
Unknown status 17
Recruiting 13
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Clinical Trial Sponsors for Viagra

Sponsor Name

Sponsor Name for Viagra
Sponsor Trials
Pfizer 31
Rambam Health Care Campus 5
Duke University 5
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Sponsor Type

Sponsor Type for Viagra
Sponsor Trials
Other 128
Industry 54
NIH 13
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