More than half the world's population lives in areas where there is a
potential risk of malaria. Programs for controlling malaria in cities
and other areas of developing countries have broken down for many reas
ons, including the cost of vector control, resistance of mosquitoes to
readily available insecticides such as DDT and the emergence of paras
ites that are resistant to cheap, safe antimalarial drugs. Wars, polit
ical instability and population migration have increased the difficult
y of implementing control programs. The increase in travel to malaria
endemic areas and the changing pattern of sensitivity to antimalarial
drugs make it imperative for physicians to keep up to date with recomm
endations for malaria chemoprophylaxis. This article reviews the avail
able drugs and compares the prophylactic regimens recommended by vario
us authorities.