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

Sponsor

National Institute of Allergy and Infectious Diseases (NIAID) (NIH)

Overall Status

Completed

CT.gov ID

NCT00001002

Collaborator

(none)

Enrollment

Locations

Patients Per Site

Study Details

Study Description

Brief 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.

Condition or Disease	Intervention/Treatment	Phase
HIV Infections	Drug: Zidovudine Drug: Foscarnet sodium	Phase 1

Detailed Description

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.

Study Design

Study Type:

Interventional

Masking:

None (Open Label)

Primary Purpose:

Treatment

Official Title:

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

Actual Study Completion Date :

Jun 1, 1991

Outcome Measures

Primary Outcome Measures

Eligibility Criteria

Criteria

Ages Eligible for Study:

18 Years and Older

Sexes Eligible for Study:

All

Accepts Healthy Volunteers:

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.