Refolinon is a pharmaceutical medication primarily used in the treatment and management of certain medical conditions that involve folate deficiency. It contains folinic acid, also known as leucovorin, which is a form of folic acid. Folic acid is a type of B vitamin that is crucial for the production of red blood cells and for the synthesis of DNA, which is essential for all bodily functions. Refolinon is often prescribed to patients undergoing chemotherapy as it can help protect healthy cells from the toxic effects of certain chemotherapy drugs. Additionally, it is used to treat or prevent low blood levels of folate (folate deficiency), anemia, and in some cases, can be used to counteract the effects of folic acid antagonists. Its administration can be oral or by injection, depending on the specific needs and condition of the patient.