Pharmacokinetic (PK) Study of Twice Daily vs Once Daily Lamivudine (3TC) and Abacavir (ABC) as Part of Combination Antiretroviral Therapy (ART) in HIV Infected Children

Pharmacokinetic Study of Twice Daily vs Once Daily Lamivudine and Abacavir as Part of Combination Antiretroviral Therapy in Children With HIV Infection

Cross-over 28 week study of the plasma pharmacokinetic profiles of twice daily 3TC (4mg/kg/dose BD) with once daily 3TC (8mg/kg/dose OD) and twice daily ABC (8mg/kg/dose BD) with daily ABC (16mg/kg/dose OD) where one or both drugs are being taken as part of combination antiretroviral therapy.

Inclusion Criteria:

• Children with definitive HIV infection
• Age > 2 and < 13 years
• Currently on combination ART including 3TC and / or ABC, for at least 6 months, with stable CD4 cell count and HIV RNA viral load and expected to stay on this regimen for at least a further 3 months.

Exclusion Criteria:

• • Intercurrent illness

  • Receiving concomitant therapy except prophylaxis against Pneumocystis carinii pneumonia (PCP)
  • Abnormal renal or liver function (grade 3 or above)