CELKERAN 2  Tablet is used in the treatment of some cancers of blood and lymphatic system. It may be also used to treat other kinds of cancer, as determined by the doctor. It is used alone or in combination with other cancer medicines. CELKERAN 2 Tablet kills or stops the growth of cancer cells and also prevents the multiplication of cancer cells. It is a potent and very toxic medicine and you should discuss the risks and benefits with your doctor.