Currently used antiparasitic drugs, including benzimidazoles, nitroimi
dazoles, avermectins, polyene ionophores, hydroxynaphthoquinones and s
esquiterpene lactones, were identified through the empirical route to
drug discovery. The modern rational approach to drug design is focused
upon the structure and function of biochemical and molecular targets.
The requisite pharmacological properties for new anti-parasite drugs
should not be ignored in this process.