<prompt> Which of the following causes retinal pigmentation?QuinineChloroquineMefloquineAtovaquone  <response>: Ans. is b i.e., Chloroquine Chloroquine is a 1st line anti malarial drug, which is an erythrocytic schizonticide. However, its prolonged use of high doses as in DLE, rheumatoid arthritis may cause loss of vision due to retinal damage in the form of retinal pigmentation. Chloroquine may also cause corneal deposits and affect vision and are reversible on discontinuation. Loss of hearing, rashes, photoallergy, myopathy, graying of hair may occur. 