A Phase I/II, Open-Label, Multi-Center Study of the Pharmacokinetics, Safety, Tolerance and Activity of Two Dose Levels of Adefovir Dipivoxil (ADF) and Nelfinavir When Added to Antiretroviral Therapy for the Treatment of HIV-Infected Pediatric Patients

During the first phase of the study (Days 1-6), the safety and tolerability of multiple doses of ADF is assessed when administered simultaneously with the patient's reverse transcriptase inhibitor (RTI) regimen. The second phase begins on Day 7 when nelfinavir is added to the therapy regimen for an additional 15 weeks. ADF pharmacokinetics are measured on Days 1, 2, and 7 (on a subset of 18 patients); peak and trough samples are collected on Day 28.