Chloraquine-Primaquine -- Dapsone - In the Central Highlands the malaria infected mosquitoes were so bad that everyone in the field had to take "two whites and a yellow". The two small white pills were Dapsone and taken daily.  The very large yellow pill was the Chloraquine-Primaquine and it was taken once a week. The whites were very bitter and the yellow was so large that it was very difficult to swallow, therefore I required the medics to administer them personally.