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Last Updated: November 22, 2024

CLINICAL TRIALS PROFILE FOR VIAGRA


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All Clinical Trials for VIAGRA

Trial ID Title Status Sponsor Phase Start Date 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 2003-03-10 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.
NCT00080808 ↗ Nerve-Sparing Radical Prostatectomy With or Without Nerve Grafting Followed by Standard Therapy for Erectile Dysfunction in Treating Patients With Localized Prostate Cancer Completed National Cancer Institute (NCI) Phase 2 2001-08-01 RATIONALE: Nerve-sparing radical prostatectomy with nerve grafting followed by standard therapies for erectile dysfunction may be effective in helping patients with prostate cancer improve sexual satisfaction and quality of life. It is not yet known whether erectile dysfunction therapy and nerve-sparing prostatectomy are more effective with or without nerve grafting. PURPOSE: This randomized phase II trial is studying nerve grafting and standard therapy to see how well they work compared to standard therapy alone in treating erectile dysfunction in patients undergoing nerve-sparing radical prostatectomy for localized prostate cancer.
NCT00080808 ↗ Nerve-Sparing Radical Prostatectomy With or Without Nerve Grafting Followed by Standard Therapy for Erectile Dysfunction in Treating Patients With Localized Prostate Cancer Completed M.D. Anderson Cancer Center Phase 2 2001-08-01 RATIONALE: Nerve-sparing radical prostatectomy with nerve grafting followed by standard therapies for erectile dysfunction may be effective in helping patients with prostate cancer improve sexual satisfaction and quality of life. It is not yet known whether erectile dysfunction therapy and nerve-sparing prostatectomy are more effective with or without nerve grafting. PURPOSE: This randomized phase II trial is studying nerve grafting and standard therapy to see how well they work compared to standard therapy alone in treating erectile dysfunction in patients undergoing nerve-sparing radical prostatectomy for localized prostate cancer.
>Trial ID >Title >Status >Phase >Start Date >Summary

Clinical Trial Conditions for VIAGRA

Condition Name

Condition Name for VIAGRA
Intervention Trials
Erectile Dysfunction 30
Impotence 17
Prostate Cancer 7
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Condition MeSH

Condition MeSH for VIAGRA
Intervention Trials
Erectile Dysfunction 49
Hypertension 27
Hypertension, Pulmonary 16
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Clinical Trial Locations for VIAGRA

Trials by Country

Trials by Country for VIAGRA
Location Trials
United States 204
Canada 17
United Kingdom 13
Australia 10
Denmark 9
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Trials by US State

Trials by US State for VIAGRA
Location Trials
California 17
Texas 17
New York 14
Maryland 10
Ohio 10
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Clinical Trial Progress for VIAGRA

Clinical Trial Phase

Clinical Trial Phase for VIAGRA
Clinical Trial Phase Trials
Phase 4 50
Phase 3 14
Phase 2/Phase 3 5
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Clinical Trial Status

Clinical Trial Status for VIAGRA
Clinical Trial Phase Trials
Completed 98
Unknown status 21
Terminated 18
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Clinical Trial Sponsors for VIAGRA

Sponsor Name

Sponsor Name for VIAGRA
Sponsor Trials
Pfizer 34
Pfizer's Upjohn has merged with Mylan to form Viatris Inc. 23
The University of Texas Medical Branch, Galveston 5
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Sponsor Type

Sponsor Type for VIAGRA
Sponsor Trials
Other 172
Industry 85
NIH 17
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