Etoposide injection is a chemotherapy medication used to treat certain types of cancer, such as small cell lung cancer, lymphomas, and testicular cancer. It is available in a liquid form and is administered through an intravenous (IV) line. The dosage and frequency of the injections depend on the type of cancer being treated and the patient's overall health. It is important to follow your doctor's instructions carefully when taking etoposide injection, as it can be toxic to the body if not taken correctly. Possible side effects include nausea, vomiting, diarrhea, hair loss, and low blood counts.