Although zidovudine (AZT) has been effective in treating some AIDS patients, AZT has toxic effects in many patients and other means of treating HIV-infected persons need to be evaluated. In vitro (test tube) studies have shown that the human herpes viruses are inhibited by foscarnet and that a number of retroviruses, including HIV, are sensitive to it. It is hoped that treatment of HIV-infected individuals with foscarnet during an early phase of HIV infections will reduce the risk of developing AIDS.~Patients are divided into three groups: (1) asymptomatic patients with or without persistent generalized lymphadenopathy (PGL) syndrome; (2) patients with AIDS; and (3) patients who have or have had mild to moderate signs or symptoms consistent with HIV infection. Patients are then randomly chosen to receive one of three different foscarnet doses. The drug is given for 4 weeks, by 1-hour infusion administered every 8 hours. In addition, those patients who are clinically stable and have not experienced severe toxicity at the end of the 4 weeks may continue treatment, in the form of a single daily dose of foscarnet to be administered 5 days per week. Blood samples are taken during treatment and at the first, fourth, and eighth week after treatment. If the patient is on maintenance, blood samples are taken weekly. Effective 7-17-89, patients entering the study are assigned to the lowest foscarnet dose. Patients receive daily treatment for 28 days. Patients who are clinically stable without severe toxicity at 4 weeks have the option of maintenance therapy with foscarnet.
To determine the toxicity of low dose foscarnet administered for 4 weeks to HIV infected patients who are asymptomatic, have AIDS, or other HIV associated conditions and a CD4+ lymphocyte count < 500 cells/mm3. To obtain preliminary efficacy data. Although zidovudine (AZT) has been effective in treating some AIDS patients, AZT has toxic effects in many patients and other means of treating HIV-infected persons need to be evaluated. In vitro (test tube) studies have shown that the human herpes viruses are inhibited by foscarnet and that a number of retroviruses, including HIV, are sensitive to it. It is hoped that treatment of HIV-infected individuals with foscarnet during an early phase of HIV infections will reduce the risk of developing AIDS.