Is Mitotane a chemotherapy drug or a targeted drug?

Mitotane is often mistaken as a traditional chemotherapy drug in the eyes of many patients. In fact, it is different from classic chemotherapy and cannot be completely classified as a targeted drug in the modern sense. Mitotane is an adrenal cytotoxic drug that is highly selective. It can directly act on adrenocortical cells, inhibit intracellular steroid production, and ultimately lead to tumor cell necrosis. Mechanistically, it is different from common chemotherapy drugs (such as taxanes or alkylating agents) that kill rapidly dividing cells over a wide range. Instead, it prefers to destroy adrenal tissue at a targeted location, so it is often classified as an "adrenal gland-specific cytotoxic drug."

Compared with targeted drugs, mitotane also has certain similarities. Targeted drugs usually target specific molecular pathways or gene mutations. Although mitotane does not have a clear molecular target, it shows a high degree of specificity for adrenocortical cells and hardly affects other tissues. This "directional" mode of action gives it a unique position in the treatment of adrenal cancer, and also makes it have a certain degree of overlap with targeted drugs in clinical application. But strictly speaking, it does not belong to the category of targeted therapy, but is a special type of drug between traditional chemotherapy and targeted drugs.

Therefore, from a classification point of view, mitotane cannot be completely regarded as a traditional chemotherapy drug, nor is it equivalent to a targeted drug, but a special anti-cancer drug with selective cytotoxicity. It is more important for patients to understand its central role in the treatment of adrenal cancer rather than get too hung up on classification. Because it can gradually accumulate and maintain a stable concentration in the body, it is often used clinically as a long-term treatment drug. With the deepening of research, people have a clearer understanding of the mechanism of action of mitotane, which has also promoted its combined use with other therapies to improve the overall efficacy.

Reference materials:https://go.drugbank.com/drugs/DB00648