What will happen if you suddenly stop taking mitotane after one year? How to stop medication correctly?

Mitotane is a cytotoxic drug used to treat adrenocortical cancer (ACC). It mainly works by inhibiting the synthesis of adrenocortical hormones and destroying adrenal tissue. If a patient suddenly stops taking mitotane after taking it for a year, it can result in severe rebound effects, including a rapid recovery of adrenal function, leading to a surge in cortisol levels that promotes the growth of cancer cells and recurrence of the disease. In addition, since mitotane inhibits adrenal cortex function, sudden discontinuation may lead to acute adrenal crisis, leading to severe hypotension, fatigue, hypoglycemia and even shock, which is life-threatening.

To avoid the risk of sudden discontinuation, discontinuation of mitotane needs to be strictly monitored by a physician. Typically, doctors will assess a patient's disease progression, drug levels in the body, and adrenal gland function, and then gradually reduce the dose of the drug rather than discontinuing it suddenly. During the withdrawal process, patients need to regularly detect the level of mitotane in the blood and adjust the speed of tapering based on the test results to ensure that the adrenal glands can gradually adapt to the new hormone levels and reduce the risk of side effects.

During discontinuation of mitotane, patients may need supplemental corticosteroids, such as hydrocortisone, to help maintain hormonal balance in the body. Because the effects of mitotane may last for weeks or even months and recovery of adrenal function is slow after discontinuation of the drug, exogenous hormonal support is essential to prevent adrenal crisis. In addition, doctors may also recommend that patients gradually return to a normal lifestyle and monitor whether symptoms of hormonal disorders such as fatigue, nausea, and hypotension occur so that treatment plans can be adjusted in a timely manner.

In general, mitotane should not be stopped suddenly at will, especially after long-term use. The correct way to discontinue medication is to gradually reduce the dose, closely monitor the patient's hormone levels and body response, and supplement hormones if necessary to ensure a safe and smooth discontinuation process. If patients have any symptoms of discomfort, they should contact their doctor immediately so that the treatment plan can be adjusted in a timely manner to ensure that the disease is well controlled and at the same time reduce the occurrence of adverse reactions.

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