Complex sentence: Gemcitabine, sold under the brand name Gemzar, among others, is a chemotherapy medication used to treat a number of types of cancer, includng breast cancer, ovarian cancer, non-small cell lung cancer, pancreatic cancer, and bladder cancer.
Split into simpler sentences: Gemcitabine, sold under the brand name Gemzar, among others, is a chemotherapy medication used to treat a number of types of cancer. These cancers include breast cancer, ovarian cancer, non-small cell lung cancer, pancreatic cancer, and bladder cancer.