Viagra, which was originally created to treat chest pain and later marketed for erectile dysfunction, has been repurposed before. But recent research has discovered yet another possible use for the drug: treatment of malaria. The most deadly strain of the disease causes harm by causing cells to secrete certain “camouflage” chemicals that fool the immune system into thinking malaria-infected cells are healthy. But Viagra’s active ingredient has been shown to prevent the secretion of this camouflage chemical and allow the immune system to seek out and destroy malaria infection.

 

CNBC
See article in Popular Science