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LYSODREN (mitotane) should be temporarily discontinued immediately following shock or severe trauma, since adrenal suppression is its prime action. Exogenous steroids should be administered in such circumstances, since the depressed adrenal may not immediately start to secrete steroids.

LYSODREN (mitotane) should be administered with care to patients with liver disease other than metastatic lesions from the adrenal cortex, since the metabolism of LYSODREN (mitotane) may be interfered with and the drug may accumulate.

All possible tumor tissues should be surgically removed from large metastatic masses before LYSODREN (mitotane) administration is instituted. This is necessary to minimize the possibility of infarction and hemorrhage in the tumor due to a rapid cytotoxic effect of the drug.

Long-term continuous administration of high doses of LYSODREN (mitotane) may lead to brain damage and impairment of function. Behavioral and neurological assessments should be made at regular intervals when continuous LYSODREN (mitotane) treatment exceeds 2 years.

A substantial percentage of the patients treated show signs of adrenal insufficiency. It therefore appears necessary to watch for and institute steroid replacement in those patients. However, some investigators have recommended that steroid replacement therapy be administered concomitantly with LYSODREN (mitotane) . It has been shown that the metabolism of exogenous steroids is modified and consequently somewhat higher doses than normal replacement therapy may be required.



Adrenal insufficiency may develop in patients treated with LYSODREN (mitotane) , and adrenal steroid replacement should be considered for these patients.

Since sedation, lethargy, vertigo, and other CNS side effects can occur, ambulatory patients should be cautioned about driving, operating machinery, and other hazardous pursuits requiring mental and physical alertness.

Carcinogenesis, Mutagenesis, Impairment of Fertility

The carcinogenic and mutagenic potentials of LYSODREN (mitotane tablets, USP) are unknown. However, the mechanism of action of this compound suggests that it probably has less carcinogenic potential than other cytotoxic chemotherapeutic drugs.


Pregnancy Category C

Animal reproduction studies have not been conducted with LYSODREN (mitotane) . It is also not known whether LYSODREN (mitotane) can cause fetal harm when administered to a pregnant woman or can affect reproduction capacity. LYSODREN (mitotane) should be given to a pregnant woman only if clearly needed.

Nursing Mothers

It is not known whether this drug is excreted in human milk. Because many drugs are excreted in human milk and because of the potential for adverse reactions in nursing infants from mitotane, a decision should be made whether to discontinue nursing or to discontinue the drug, taking into account the importance of the drug to the mother.

Pediatric Use

Safety and effectiveness in pediatric patients have not been established.

Geriatric Use

Clinical studies of LYSODREN (mitotane) did not include sufficient numbers of patients aged 65 years and older to determine whether they respond differently than younger patients. Other reported clinical experience has not identified differences in responses between elderly and younger patients. In general, dose selection for an elderly patient should be cautious, usually starting at the low end of the dosing range, reflecting the greater frequency of decreased hepatic, renal, or cardiac function, and of concomitant disease or other drug therapy.

This monograph has been modified to include the generic and brand name in many instances.

Last reviewed on RxList: 1/27/2014


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