Vesimycin 2mg Injection is used in the treatment of certain kinds of cancer of pancreas, breast, lung, and stomach. It can be used alone or in combination with some medicines as part of combination chemotherapy. It works by interfering with the growth of cancer cells, which are eventually destroyed. Vesimycin 2mg Injection is given as an injection into vein under the supervision of a doctor and should not be self-administered. Your doctor will decide what dose is necessary and how often you need to take it. This will depend on what you are being treated for and may change from time to time. You should take it exactly as your doctor has advised. Taking it in the wrong way or taking too much can cause very serious side effects. It may take several weeks or months for you to see or feel the benefits but do not stop taking it unless your doctor tells you to. The most common side effects of this medicine include anemia (low number of red blood cells), decreased white blood cell count, increased bleeding tendency, loss of appetite, nausea, and vomiting. If these bother you or appear serious, let your doctor know. There may be ways of reducing or preventing them. Before taking this medicine, inform your doctor if you have medical conditions involving blood, kidney, and liver or if you are suffering from any breathing disorder. This medicine is known to reduce the number of blood cells in your blood thereby, increasing the susceptibility to infections. Regular blood tests are required to check your blood cells along with kidney, liver and heart function during treatment with this medicine. The use of effective contraception by both males and females during treatment is important to avoid pregnancy.