This study will evaluate a new and safe testing method for identifying medicines that can cause problems in glucose-6-phosphate dehydrogenase (G6PD) deficient individuals. We are looking for volunteers with G6PD deficiency who would be willing to donate blood samples.
Inclusion: * Normal clinical evaluation * Willing and able to make all scheduled visits Exclusion: * pregnant or planning pregnancy * Have taken any anti-malarial medication in past month * Positive blood tests for HIV and specific types of hepatitis * Allergic to primaquine