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A Study of Foscarnet in the Treatment of HIV Infection in Patients Who Have Taken Zidovudine for a Long Time

Information source: National Institute of Allergy and Infectious Diseases (NIAID)
ClinicalTrials.gov processed this data on August 23, 2015
Link to the current ClinicalTrials.gov record.

Condition(s) targeted: HIV Infections

Intervention: Zidovudine (Drug); Foscarnet sodium (Drug)

Phase: Phase 1

Status: Completed

Sponsored by: National Institute of Allergy and Infectious Diseases (NIAID)

Official(s) and/or principal investigator(s):
Jacobson MA, Study Chair

Summary

To study the toxicity, pharmacokinetics, and antiretroviral effectiveness of combined oral zidovudine (AZT) and intermittent intravenous foscarnet therapy in stable AIDS or AIDS

related complex (ARC) patients who have already received AZT for 8 - 52 weeks.

It is hypothesized that the maximum AZT antiretroviral effect, which occurs at 8 weeks of therapy, will be enhanced by 2 weeks of foscarnet treatment, given at the same time by intermittent intravenous infusion. In addition, the further lowering of serum p24 antigen concentration that should occur during combined therapy might continue when oral AZT therapy is continued without foscarnet.

Clinical Details

Official title: Intermittent Foscarnet Therapy for Human Immunodeficiency Virus Infection in Patients Receiving Long-Term Zidovudine Therapy

Study design: Masking: Open Label, Primary Purpose: Treatment

Detailed description: It is hypothesized that the maximum AZT antiretroviral effect, which occurs at 8 weeks of therapy, will be enhanced by 2 weeks of foscarnet treatment, given at the same time by intermittent intravenous infusion. In addition, the further lowering of serum p24 antigen concentration that should occur during combined therapy might continue when oral AZT therapy is continued without foscarnet. There is a 4-week prestudy monitoring period during which AZT alone is administered on an outpatient basis, followed by a 2-week study period during which both intravenous foscarnet and oral AZT are administered in the hospital. During the subsequent 6-month follow-up period, oral AZT is administered and patients receive clinical evaluations. AZT is held for 48 hours on days before hospitalization and for 24 hours at the end of the hospitalization.

Eligibility

Minimum age: 18 Years. Maximum age: N/A. Gender(s): Both.

Criteria:

Inclusion Criteria Concurrent Medication: Allowed: Medication necessary for the patient's welfare at the discretion of the investigator. Patients must have the following:

- Received zidovudine (AZT) 200 mg every 4 hours (q4h) continuously for 8 - 16 weeks

without Grade 3 or higher toxicity.

- Detectable p24 antigen in serum on at least 2 occasions during the prestudy period.

All serum p24 antigen concentrations measured during the prestudy period must be at least twice the concentration cutoff value of the assay.

- Capability of giving informed consent.

- Per amendment of 890721, patients must enter the study period by September 30, 1989.

Exclusion Criteria Co-existing Condition: Patients with the following will be excluded:

- A history of hypersensitivity reaction to foscarnet or zidovudine (AZT).

- History of Grade 3 or 4 toxicity with AZT.

- Current Grade 2 or higher AZT toxicity.

- Osteomalacia, neoplasm metastatic to bone, or other known bone disease.

- Active opportunistic infection requiring myelosuppressive or nephrotoxic therapy.

Concurrent Medication: Excluded:

- Antimetabolites.

- Immunomodulators.

- Nephrotoxins.

- Antiviral therapy.

- Myelosuppressive or nephrotoxic therapy.

- Acetaminophen.

Patients with the following will be excluded:

- A history of hypersensitivity reaction to foscarnet or zidovudine (AZT).

- History of Grade 3 or 4 toxicity with AZT.

- Current Grade 2 or higher AZT toxicity.

- Osteomalacia, neoplasm metastatic to bone, or other known bone disease.

- Active opportunistic infection requiring myelosuppressive or nephrotoxic therapy.

Locations and Contacts

University of Minnesota, ACTU, Minneapolis, Minnesota 55455, United States

Unc Aids Crs, Chapel Hill, North Carolina 27599, United States

Additional Information

Click here for more information about Zidovudine

Related publications:

Jacobsen MA, van der Horst C, Causey DM, Dehlinger M, Hafner R, Mills J. In vivo additive antiretroviral effect of combined zidovudine and foscarnet therapy for human immunodeficiency virus infection (ACTG Protocol 053). J Infect Dis. 1991 Jun;163(6):1219-22.

Aweeka FT, Gambertoglio JG, van der Horst C, Raasch R, Jacobson MA. Pharmacokinetics of concomitantly administered foscarnet and zidovudine for treatment of human immunodeficiency virus infection (AIDS Clinical Trials Group protocol 053). Antimicrob Agents Chemother. 1992 Aug;36(8):1773-8.


Last updated: March 28, 2012

Page last updated: August 23, 2015

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