Eligibility Criteria:
Inclusion Criteria
Concurrent Medication:
Required for patients with CD4 count \<= 200 cells/mm3:
* PCP prophylaxis using TMP/SMX or aerosolized pentamidine.
Allowed:
* Topical antifungal agents.
* Up to 1000 mg/day acyclovir as maintenance therapy for herpes simplex virus.
* Antibiotics for bacterial infections.
* Antipyretics, analgesics, nonsteroidal anti-inflammatory agents, antiemetics, and methadone for symptomatic treatment.
Patients must have:
* HIV infection.
* CD4 count 150 - 500 cells/mm3.
Exclusion Criteria
Co-existing Condition:
Patients with the following symptoms or conditions are excluded:
* Unable to tolerate the standard diet required for the study.
* Unable to give informed consent.
Concurrent Medication:
Excluded:
* Antiretrovirals and biologic response modifiers (including HIV vaccines).
* Maintenance with ketoconazole, fluconazole, itraconazole, ganciclovir, foscarnet, pyrimethamine, sulfadiazine, clindamycin, azithromycin, isoniazid, rifampin, rifabutin, ethambutol, pyrazinamide, clofazimine, or clarithromycin.
* Prophylaxis for Mycobacterial infection or fungal infections other than Candidiasis.
* Allopurinol.
* Omeprazole.
* Astemizole.
* Terfenadine.
* Loratadine.
* Psychotropics.
* Phenylbutazone.
* Barbiturates.
* Benzodiazepines.
* Monoamine oxidase inhibitors.
* H-2 blockers.
* Anticonvulsants.
* Coumadin anticoagulants.
* Oral contraceptives.
* Antiarrhythmics.
* Diltiazem.
* Metronidazole.
* Erythromycin.
* Chloramphenicol.
* Fluoroquinolones.
* Disulfiram.
* Erythropoietin.
* G-CSF or GM-CSF.
* Systemic corticosteroids.
* Alcohol, including alcohol-containing medications.
Patients with the following prior conditions are excluded:
* Unexplained temperature \>= 38.5 C for any 7 days within the 30 days prior to study entry.
* Chronic diarrhea (\>= three stools per day) for any 15 days within the 30 days prior to study entry.
* Malignancy other than basal or squamous cell carcinoma of the skin, cervical intraepithelial neoplasia, and minimal Kaposi's sarcoma.
Prior Medication:
Excluded at any time:
* Prior HIV protease inhibitor.
Excluded within 30 days prior to study entry:
* Investigational drugs.
* Recombinant erythropoietin.
* G-CSF or GM-CSF.
* Interferon or interleukin.
* Any HIV-1 vaccine.
Excluded within 14 days prior to study entry:
* Antiretrovirals.
* Acute therapy for any opportunistic or other serious infection.
* Therapy for malignancy.
* Maintenance with ketoconazole, fluconazole, itraconazole, ganciclovir, foscarnet, pyrimethamine, sulfadiazine, clindamycin, azithromycin, isoniazid, rifampin, rifabutin, ethambutol, pyrazinamide, clofazimine, or clarithromycin.
* Prophylaxis for Mycobacterial infection or fungal infections other than Candidiasis.
Excluded within 7 days prior to study entry:
* Allopurinol.
* Omeprazole.
* Astemizole.
* Terfenadine.
* Loratadine.
* Psychotropics.
* Phenylbutazone.
* Barbiturates.
* Benzodiazepines.
* Monoamine oxidase inhibitors.
* H-2 blockers.
* Anticonvulsants.
* Coumadin anticoagulants.
* Oral contraceptives.
* Antiarrhythmics.
* Diltiazem.
* Metronidazole.
* Erythromycin.
* Chloramphenicol.
* Fluoroquinolones.
* Disulfiram.
Risk Behavior: Excluded:
* History of substance or alcohol abuse.
* Ingestion of more than 50 g alcohol daily within 6 months prior to study entry.
* Recovered alcoholic.