Treatment of chronic hepatitis C infection with interferon has been disappo
inting, with about 16 % of patients achieving a sustained response. Approxi
mately 10 % of patients will fail to complete a full course of treatment ma
inly because of side-effects. Treatment with interferon-a and ribavirin lea
ds to a sustained response in 38-43 % of patients. Several new agents, such
as amantadine, are showing promise. However, treatment response rates are
still likely to remain poor and the treatment is very expensive. Infection
with the hepatitis C virus is a major public health problem. New affordable
drugs are desperately needed to help treat the vast numbers of people infe
cted world-wide. (C) 2000 Lippincott Williams & Wilkins.