A drug used to treat bacterial and parasitic infections. It is also being studied in the treatment of cancer.

Suramin is a medicinal drug developed by Oskar Dressel and Richard Kothe of Bayer, Germany in 1916. It is used for treatment of human sleeping sickness, onchocerciasis and other diseases caused by trypanosomes and worms. It is under investigation as treatment for prostate cancer.

a polysulfonated maphylurea used to treat trypanosomiasis and filiarasis that is also active against several tumors.