Leukeran can increase your risk of bleeding or infection. Call your doctor if you have unusual bruising or bleeding, or new signs of infection (fever, chills, weakness).
Before taking this medicine
You should not be treated with Leukeran if you are allergic to it, or if you have received this medicine in the past without successful treatment of your condition.
You may not be able to receive Leukeran if you've ever had an allergic reaction to another cancer drug such as bendamustine, busulfan, carmustine, dacarbazine, ifosfamide, lomustine, mechlorethamine, melphalan, streptozocin, or temozolomide.
Tell your doctor if you have ever had:
kidney disease;
liver disease;
a seizure;
a head injury or brain tumor; or
if you have received radiation or chemotherapy within the past 4 weeks.
Taking Leukeran may increase your risk of developing other types of cancer. Talk to your doctor about your specific risk.
Do not use Leukeran if you are pregnant. It could harm the unborn baby or cause birth defects. Use effective birth control to prevent pregnancy while you are using  Leukeran.
This medicine may affect fertility (ability to have children) in both men and women. However, women should still use birth control to prevent pregnancy because Leukeran can harm an unborn baby.
You should not breastfeed while using this medicine.
