Over the past 3 years, the treatment and prognosis of HIV-1 infection have
been revolutionized by a better understanding of the pathogenesis of HIV-1
infection, the ability to monitor viral replication and drug resistance in
the host, and the availability of potent combination chemotherapy. While mo
st of the studies that have led to this transformation have been done in ad
ults, the results can be applied to the care of children. Data from trials
of highly active antiretroviral therapy (HAART) in children are now being p
resented or published. Although the basic principles of antiretroviral ther
apy of HIV-1 infection do not differ between adults and children, there are
important differences in the natural history of the disease and in issues
related to medication administration and adherence to therapy. Progression
of disease may be more rapid in children and is often very rapid in infants
. Administration of medication to infants and children can be difficult, es
pecially when the medication tastes bad. Finally, whereas an adult patient
is free to decline therapy, however foolish such a decision may seem to the
health-care professional, the failure to administer effective medication t
o a child for a condition that threatens serious morbidity or death constit
utes medical neglect. In this review we will discuss the basic principles u
nderlying pediatric antiretroviral therapy and address the issue of adheren
ce, the major impediment to treatment success.