AIDS-Related Opportunistic Infections--prevention & control Clarithromycin--therapeutic use Cytomegalovirus Retinitis--complications Drug Approval Drug Implants Drug Labeling Foscarnet--therapeutic use Ganciclovir--administration & dosage HIV Infections--complications Herpes Simplex--complications Infusions, Intravenous Mycobacterium avium-intracellulare Infection--complications Stavudine--therapeutic use United States United States Food and Drug Administration