Lomustine is an alkylating nitrosourea compound used in chemotherapy. It is in the same family as streptozotocin. This is a highly lipid soluble drug, and thus crosses the blood-brain barrier. This property makes it ideal for treating brain tumors, and is its primary use. Lomustine has a long time to nadir. Lomustine is used alone or in combination with other medicines to treat brain tumors, Hodgkin's disease, and other kinds of cancer. This medicine belongs to the group of medicines known as alkylating agents.Lomustine interferes with the growth of cancer cells, which are eventually destroyed. Since the growth of normal body cells may also be affected by lomustine, other effects may occur. Some of these may be serious and must be reported to your doctor. Other effects may not be serious, but may cause concern. Some effects may not occur for months or years after the medicine is used.