A study of the safety, tolerance and pharmacokinetics of Nelfinavir co-administered with Stavudine (d4T) and Didanosine (ddI) in HIV-exposed infants

Project no.: HIV-NAT 007

Background:

  • The pediatric oral powder formulation of Nelfinavir has been studied in small groups of HIV-infected children
  • Serveral small pediatric trials suggest Nelfinavir as part of a combination regimen is generally well tolerated and has the same potential clinical benefit that have been noted in adults
  • This study will provide information to be used further in a propose phase 3 study

Study population: 12-36 evaluable newborn infants born to HIV-infected women

Regimen:

  • Nelfinavir 15 mg/kg PO every 12 hours*
  • d4T 1 mg/kg PO every 12 hours
  • ddI 100 mg/m2 PO every 24 hours

*Analysis of the pharmacokinetic data from the first cohort (21 infants) may require recruitment for the next cohort in which Nelfinavir dose will be increased (30 mg/kg & 45 mg/kg BID)

Objectives:

  • To access the safety and tolerance of the triple combination regimen of Nelfinavir, d4T and ddI in HIV-exposed newborn infants
  • To determine the appropriate dosage of Nelfinavir and to access its pharmacokinetics when given in combination with d4T and ddI in HIV-exposed newborn infants

Study Design:

  • An open label, dose-escalating, multiple-dose pharmacokinetic study
  • The regimen will be administered to infants, within 12 hours of birth born to HIV-infected women all of whom should have received Zidovudine prophylactic regimen during pregnency and labor as standard of care
  • In addition to receiving d4T and ddI, infants will receive Nelfinavir 15 mg/kg BID for the first cohort, 30 mg/kg BID for the second cohort and 45 mg/kg for the third cohort for a period of 4 weeks
  • Quantification of plasma Nelfinavir concentrations and pharmacokinetic analysis will be run on a real time basis and the dose of Nelfinavir adjusted for each cohort as required
  • All infants will be followed for 4 months after birth to determine their HIV infection status