Mepacrine is a type of drug that is also commonly known as quinacrine. It is often used as an anti-malaria medication and has been used to treat other diseases such as lupus and arthritis. The drug is also known by other names such as Atebrin, Atabrine, and Amquin. It is classified as an acridine compound and is a member of the 4-aminoquinoline family. Mepacrine works by preventing the replication of the malaria parasite within the body. It is available in various forms such as tablets, injections, and capsules. Mepacrine is an essential medication in tropical regions where malaria is prevalent.