The largest, as well as most diverse categories of organic compounds are made up of heterocyclic compounds. Since there has been so much synthetic research done on them and because of their usefulness in synthetic processes, there are currently many heterocyclic compounds that are known. Despite great developments in cancer treatment, carcinoma continues to rank among the leading causes of death worldwide. Because more individuals are embracing unhealthy lifestyles that include poor diets, frequent smoking, and lower levels of physical activity, the impact of cancer will likely increase in the future. Numerous anti-cancer medications now on the market have heterocycles as important structural elements. This review study includes a list of various heterocyclic substances that are now being sold as anti-cancer medications.