The first 12 patients will take AZT capsules every 4 hours, and 6 of the patients will also take ACV 6 times a day. Later groups of patients will receive higher doses of AZT if the earlier doses are tolerated without significant adverse effect. It was initially planned to stop treatment after 12 weeks, but if the first 10 patients who have entered the study have tolerated treatment well, the duration of treatment will be extended with a crossover in dosage. The treatment may be lifelong, depending on the results obtained with regard to safety and effectiveness of the drugs. Blood and urine samples will be obtained periodically in order to estimate blood levels of the drugs, to study the excretion of the drugs, and to determine the effects of the drugs on HIV and on the immune system and medical condition of the patient.