Vriestran 1mg/100mg Injection is a prescription medicine. This combination of two medicines which is used in treating various types of cancers such as cancer of breast, lung, ovary, and pancreas. It prevents cancer cells from growing and multiplying, thus destroying the tumor. Vriestran 1mg/100mg Injection can be used on its own, or sometimes given together with certain other medicines as part of combination therapy. It is given by a doctor or a nurse 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 continue taking the medicine until your doctor tells you to stop using it. The most common side effects of this medicine include insomnia (difficulty in sleeping), fatigue, fever, febrile neutropenia, anemia (low number of red blood cells), and nausea. If any of these side effects bother you or appear serious, let your doctor know. There may be ways of reducing or preventing them. Before taking this medicine, tell your doctor if you have any problems with your heart, liver, or kidneys. To make sure it is safe for you, let your doctor also know all the other medicines you are taking. Pregnant and breastfeeding women should inform their doctors before using this medicine.