Melphalan powder is a chemotherapeutic medicine used to treat certain diseases, such as multiple myeloma, ovarian cancer, and melanoma. It is categorised as an alkylating agent, which implies that it inhibits the growth and division of cancer cells by interfering with their DNA. There are various types of melphalan available, including a powder for reconstitution. For intravenous (IV) administration, the powder form of melphalan is commonly combined with a liquid, such as sterile water or saline. The patient is subsequently administered the medication via a vein. Melphalan powder must only be administered under the guidance of a medical practitioner with knowledge of administering chemotherapy because it is a prescription medication.