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Last Updated: October 16, 2019

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CLINICAL TRIALS PROFILE FOR ADEFOVIR DIPIVOXIL

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Clinical Trials for Adefovir Dipivoxil

Trial ID Title Status Sponsor Phase Start Date Summary
NCT00000843 The Safety and Effectiveness of Adefovir Dipivoxil in HIV-Infected Children Completed National Institute of Allergy and Infectious Diseases (NIAID) Phase 1 1969-12-31 To evaluate the single-dose pharmacokinetic profile and acute toxicity of bis-POM PMEA ( adefovir dipivoxil ) in HIV-1 infected children, and to determine whether age-related differences exist. To ascertain dosages that may be suitable for a multiple-dose evaluation in this patient population. Although the oral bioavailability of PMEA ( adefovir ) is low, the prodrug bis-POM PMEA has resulted in increased bioavailability in adult patients in clinical trials. However, the safety and pharmacokinetic patterns of drugs in infants often differ from those of adults and the direction of the variation is not predictable. This study will assess these parameters of bis-POM PMEA in children.
NCT00000885 Treatment Success and Failure in HIV-Infected Subjects Receiving Indinavir in Combination With Nucleoside Analogs: A Rollover Study for ACTG 320 Completed National Institute of Allergy and Infectious Diseases (NIAID) Phase 2 1969-12-31 Group A: To compare the time to confirmed virologic failure (2 consecutive plasma HIV-RNA concentrations of 500 copies/ml or more) between the treatment arms: abacavir (ABC) or placebo in combination with zidovudine (ZDV), lamivudine (3TC), and indinavir (IDV). To evaluate the safety and tolerability of these treatment arms. [AS PER AMENDMENT 06/16/99: To compare the time to confirmed treatment failure, permanent discontinuation of treatment, or death between the treatment arms.] [AS PER AMENDMENT 12/27/01: Groups B, C, and D completed follow-up on March 4, 1999. Therefore, only information pertinent to Group A is applicable.] Group B: To compare the proportion of patients who achieve plasma HIV-1 RNA concentrations below 500 copies/ml, as assessed by the standard Roche Amplicor assay at Week 16, or to compare the absolute changes in plasma HIV-1 RNA concentrations at Week 16 across the treatment arms: ABC or approved nucleoside analogs and nelfinavir (NFV) or placebo in combination with efavirenz (EFV) and adefovir dipivoxil. To compare the safety and tolerability of these treatment arms. Group C: To monitor plasma HIV-1 RNA trajectory over time and determine the time to a confirmed plasma HIV-1 RNA concentration above 2,000 copies/ml on 2 consecutive determinations for patients treated with ZDV or stavudine (d4T) plus 3TC and IDV. Group D: To evaluate plasma HIV-1 RNA responses at Weeks 16 and 48. To evaluate the safety and tolerability of the treatment arms: ABC, EFV, adefovir dipivoxil, and NFV. This study explores new treatment options for ACTG 320 enrollees (and, if needed, a limited number of non-ACTG 320 volunteers) who have been receiving ZDV (or d4T) plus 3TC and IDV and are currently exhibiting a range of virologic responses. By dividing the study into the corresponding, nonsequential cohorts (Groups A, B, C, D), different approaches to evaluating virologic success, i.e., undetectable plasma HIV-1 RNA levels, and virologic failure, i.e., plasma HIV-1 RNA levels of 500 copies/ml or more [AS PER AMENDMENT 12/27/01: 200 copies/ml or more], are explored while maintaining long-term follow-up of ACTG 320 patients. [AS PER AMENDMENT 12/27/01: Groups B, C, and D completed follow-up on March 4, 1999. Therefore, only information pertinent to Group A is applicable. This study will examine the question of whether intensification of therapy can prolong the virologic benefit in individuals whose plasma HIV-1 RNA concentrations have been below the limits of assay detection on ZDV (or d4T) plus 3TC plus IDV.]
NCT00000892 A Study of Several Anti-HIV Drug Combinations in HIV-Infected Patients Who Have Used Indinavir Completed National Institute of Allergy and Infectious Diseases (NIAID) N/A 1969-12-31 To compare the proportion of patients whose plasma HIV-1 RNA is below 500 copies/ml after 16 weeks of treatment. To assess the safety, toxicity, and tolerance of each treatment arm. While indinavir is currently the most commonly prescribed protease inhibitor, the optimal therapy for a person on an indinavir-containing regimen who experiences a rebound in viral load or never experiences a decrease in viral load below 500 copies per milliliter is unknown. Current clinical practice for such patients typically involves empiric use of a combination of other protease inhibitors (saquinavir/nelfinavir or saquinavir/ritonavir) and at least 1 other antiretroviral agent to which the patient has had little or no prior exposure. This may involve the use of 1 or more reverse transcriptase inhibitors (RTIs) or nonnucleoside reverse transcriptase inhibitors (NNRTIs). This study attempts to formally evaluate some of these options in indinavir-experienced patients.
NCT00000912 A Study on Amprenavir in Combination With Other Anti-HIV Drugs in HIV-Positive Patients Completed National Institute of Allergy and Infectious Diseases (NIAID) Phase 2 1969-12-31 The purpose of this study is to compare 4 different combinations of anti-HIV drugs and to determine the number of people whose HIV blood levels decrease to 200 copies/ml or less while on the treatment. This study evaluates the safety of these drug combinations, which include an experimental protease inhibitor (PI), amprenavir. Despite the success that many patients have had with PI treatment regimens, there is still a possibility that patients receiving PIs may continue to have high HIV blood levels. Because of this possibility, alternative drug combinations containing PIs are being studied. It appears that amprenavir, when taken with 3 or 4 other anti-HIV drugs, may be effective in patients with prior PI treatment experience.
NCT00001082 The Safety and Effectiveness of Adefovir Dipivoxil in the Treatment of HIV-Infected Patients Completed National Institute of Allergy and Infectious Diseases (NIAID) Phase 3 1996-12-01 To evaluate the safety and efficacy of adefovir dipivoxil in prolonging survival of patients with advanced HIV disease. In CMV prophylaxis substudy: To evaluate the efficacy of adefovir dipivoxil in preventing the development of CMV end-organ disease in patients with advanced HIV coinfected with CMV. The optimal treatment for HIV infection and the prevention of CMV disease has not been identified. Currently available antiretroviral therapies are hampered by both significant toxicities and the development of resistance. In addition, agents for preventing CMV disease, such as oral ganciclovir, are complicated by poor bioavailability and decreased compliance secondary to toxicities. Moreover, discordant results have been reported regarding the effectiveness of oral ganciclovir for preventing CMV disease. There is a need for newer agents with anti-HIV and anti-herpesvirus activity that have good pharmacokinetic and safety profiles and that will be well tolerated by patients. Adefovir dipivoxil is an oral pro-drug of PMEA, a nucleoside analog with activity against a broad spectrum of retroviruses and herpesviruses, including important human pathogens, such as HIV-1, HIV-2 and CMV. Due to its anti-HIV and anti-herpesvirus activity, adefovir dipivoxil may be able to decrease the incidence of opportunistic herpesvirus infections and prolong survival in patients with advanced HIV infection.
NCT00001087 The Effectiveness of Nelfinavir and Efavirenz, Used Alone or Together, Combined With Other Anti-HIV Drugs in Patients Who Have Taken Anti-HIV Drugs Completed National Institute of Allergy and Infectious Diseases (NIAID) Phase 2 1969-12-31 Steps I and II: The purpose of this study is the following: To look at how many patients achieve undetectable HIV blood levels at Week 16. To look at the absolute change in HIV blood levels from the beginning of the study to Week 16. To look at the safety and tolerability of nelfinavir (NFV) and efavirenz (EFV) when used in combination or separately in regimens containing reverse transcriptase inhibitors (RTIs). For the 2 extension studies (Weeks 49 to 144): To look at the proportion of patients whose long-term viral load remains undetectable at Week 96. To look at the time from the beginning of the study to treatment failure, with patients evaluated through Week 144. Step III: To look at the proportion of patients whose HIV blood levels are undetectable 16 weeks after starting the salvage study treatment. To assess safety, toxicity, and tolerance of salvage study drug treatment. (This study has been changed by adding new objectives.) Achieving viral suppression has been widely endorsed as the primary goal of HIV therapy. However, there are few established guidelines for devising combinations of different classes of drugs which will enhance the potential for achieving viral suppression, reducing the risk of toxicity, and preserving therapeutic options for future use. This study includes 2 anti-HIV drugs, NFV (a protease inhibitor [PI]) and EFV (a nonnucleoside reverse transcriptase inhibitor [NNRTI]), for use either alone or in combination with RTI therapy for the purpose of limiting HIV replication. Patients with treatment failure at Week 16 choose 1 of the following 3 alternative salvage therapies: 2-drug PI regimen (saquinavir and ritonavir) plus adefovir dipivoxil and L-carnitine; EFV or NFV (if not already given) plus 2 new approved anti-HIV drugs outside the study; or the best available treatment outside the study. The new RTI, adefovir dipivoxil, is added to the 2-drug PI regimen to achieve suppression of viral replication and thereby delay disease progression. (This rationale reflects a change in the treatment given to patients with treatment failure at Week 16.)
>Trial ID >Title >Status >Phase >Start Date >Summary

Clinical Trial Conditions for Adefovir Dipivoxil

Condition Name

Condition Name for Adefovir Dipivoxil
Intervention Trials
Chronic Hepatitis B 28
HIV Infections 21
Hepatitis B 17
Hepatitis B, Chronic 7
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Condition MeSH

Condition MeSH for Adefovir Dipivoxil
Intervention Trials
Hepatitis B 54
Hepatitis 51
Hepatitis A 46
Hepatitis B, Chronic 41
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Clinical Trial Locations for Adefovir Dipivoxil

Trials by Country

Trials by Country for Adefovir Dipivoxil
Location Trials
United States 251
China 37
Canada 13
Korea, Republic of 12
Australia 10
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Trials by US State

Trials by US State for Adefovir Dipivoxil
Location Trials
California 25
New York 21
Maryland 18
Texas 13
Massachusetts 12
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Clinical Trial Progress for Adefovir Dipivoxil

Clinical Trial Phase

Clinical Trial Phase for Adefovir Dipivoxil
Clinical Trial Phase Trials
Phase 4 17
Phase 3 19
Phase 2/Phase 3 1
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Clinical Trial Status

Clinical Trial Status for Adefovir Dipivoxil
Clinical Trial Phase Trials
Completed 54
Unknown status 8
Withdrawn 4
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Clinical Trial Sponsors for Adefovir Dipivoxil

Sponsor Name

Sponsor Name for Adefovir Dipivoxil
Sponsor Trials
Gilead Sciences 24
GlaxoSmithKline 13
National Institute of Allergy and Infectious Diseases (NIAID) 10
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Sponsor Type

Sponsor Type for Adefovir Dipivoxil
Sponsor Trials
Industry 64
Other 37
NIH 11
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