Митотан

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Митотан

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Medically reviewed

Marina Burgos

Last updated on 10/01/2026

This page provides general, reference-level information compiled from official medical sources. It is not a substitute for professional medical advice, diagnosis, or treatment. For decisions about your health, please consult a qualified healthcare professional.

Overview of Митотан

What is Mitotane?

Mitotane is a specialized pharmacological agent used primarily in the management of adrenocortical carcinoma, a rare malignancy of the adrenal glands. It is classified as an adrenolytic agent, meaning it specifically targets and suppresses the activity of the adrenal cortex.

Mechanism of Action

The primary function of mitotane is to modify the metabolism of steroids and directly damage the mitochondria within adrenal cortical cells. This process leads to cell death and the reduction of hormone production, which is often excessive in patients with adrenal tumors. The medication acts in two distinct ways:

  • Cytotoxic effect: It exerts a direct destructive effect on the cells of the adrenal cortex, helping to shrink or limit the growth of tumorous tissue.
  • Antihormonal effect: It alters the peripheral metabolism of steroids and inhibits the production of cortisol and other hormones by the adrenal gland.

Clinical Application

Mitotane is typically utilized in cases where surgical intervention is not feasible, or as a follow-up treatment after surgery to reduce the risk of recurrence. Because of its specific focus on adrenal tissue, it is not used for other types of cancer.

Due to its unique properties, the medication stays in the body for an extended period, and its concentration in the bloodstream is often monitored by healthcare professionals to ensure the treatment remains within the desired therapeutic range. This monitoring helps in managing the balance between the drug's effectiveness and its impact on the body's natural hormone levels.

Regulatory References

  1. NIH NCI Drug Dictionary: Mitotane

What side effects are possible with Митотан?

Possible Side Effects and Safety Information

Митотан treatment is associated with a high incidence of adverse reactions, commonly affecting the gastrointestinal and nervous systems. Most patients experience adverse effects, and careful monitoring is necessary due to the drug’s narrow therapeutic window.

Key Adverse Reactions and Organ Systems

System Organ Class Very Common (ge10%) Adverse Reactions
Gastrointestinal Anorexia, Nausea, Vomiting, Diarrhea, Epigastric Discomfort
Nervous System Dizziness, Lethargy, Ataxia, Confusion, Somnolence, Paresthesia
Metabolism/Endocrine Adrenal Insufficiency (up to 100%), Hypercholesterolemia, Hypertriglyceridemia, Hypothyroidism
Blood/Lymphatic Leukopenia, Neutropenia, Prolonged Bleeding Time

Clinically Significant and Serious Safety Concerns

Mitotane is associated with several serious risks requiring immediate attention and management, as noted in regulatory warnings:

  • Adrenal Crisis: The risk of life-threatening acute adrenocortical insufficiency is present, especially in the context of shock, severe trauma, or infection. Exogenous steroids must be administered in such situations.
  • Central Nervous System (CNS) Toxicity: Severe neurological effects, including reversible brain function impairment, can occur, particularly when mitotane plasma concentrations exceed 20 mg/L.
  • Hepatotoxicity: Liver damage, including elevated enzymes and rare cases of liver failure or autoimmune hepatitis, has been reported. Liver function tests must be monitored regularly.

Population-Specific Safety Considerations

  • Women of Childbearing Potential: Due to the risk of fetal harm (Embryo-Fetal Toxicity), non-hormonal contraception must be used during treatment and for an extended period after discontinuation.
  • Premenopausal Women: Non-malignant ovarian macrocysts have been reported, necessitating monitoring (e.g., pelvic ultrasound) and potential treatment discontinuation.
  • Hepatic/Renal Impairment: Caution is required in mild-to-moderate impairment, with frequent monitoring of mitotane plasma levels particularly recommended. Use in severe impairment is generally not advised.

Safety Note: Mitotane is a strong inducer of hepatic enzymes (CYP3A4), which may require dose adjustment for co-administered drugs metabolized by these pathways, such as coumarin-type anticoagulants.

Overdose and Emergency Response

Overdose Manifestations and Toxic Exposure

The official regulatory profile for Mitotane overdose is characterized by toxicity impacting the Central Nervous System (CNS). Documented manifestations of overexposure include neurological symptoms such as drowsiness, extreme tiredness, dizziness, vertigo, sedation, and muscle weakness, which may lead to difficulty walking or gait disturbance. The primary physiological indicator for severe toxicity is a Mitotane plasma concentration exceeding 20 mg/L (or 20 mcg/mL), a threshold officially associated with an increased incidence of severe neurotoxicity. Prolonged high-dose exposure has been reported to cause reversible brain damage.

Required Emergency Actions

Immediate action is required for any suspected overdose, as no proven antidote has been established in regulatory documentation. If the individual has collapsed, is having a seizure, is experiencing trouble breathing, or cannot be awakened, immediate contact with emergency services is mandated by official guidance. In the event of confirmed high plasma levels or CNS toxicity, the drug must be withheld (temporarily discontinued). Due to the drug's extended half-life and storage in adipose tissue, management requires prolonged observation for toxicity and careful plasma level monitoring. This monitoring is specifically advised for overweight individuals or those who have recently lost weight, to mitigate the risk posed by drug accumulation and sudden release.

Therapeutic Uses of Митотан

Mitotane is a highly specialized medication used within the domain of endocrine oncology, applied where additional symptomatic support is needed to address both the condition itself and associated systemic symptoms. The medication is used for the management of adrenocortical carcinoma.

Control of Adrenocortical Carcinoma (ACC)

The condition for which Mitotane is relevant is the management of Adrenocortical Carcinoma (ACC), used in advanced cases, including metastatic or unresectable tumors. It is also used as adjuvant therapy after surgery in high-risk patients.

Management of Hormonal Overproduction Symptoms

Mitotane is relevant for easing symptoms related to endocrine overproduction that create noticeable physiological strain. It helps manage the clinical effects of hypercortisolism (Cushing's syndrome), as well as symptoms of excessive androgen or estrogen production, such as virilization or feminization. This management supports patients by helping to ease the overall symptom load related to systemic imbalance.

Quick Fact: Relief for Endocrine Overproduction

Eligibility and Restrictions for Use

Official Population Eligibility for Mitotane

Regulatory documents strictly define who can and cannot receive Mitotane. The medicine is primarily approved for use in adult patients with advanced adrenocortical carcinoma (ACC).

Classification Restricted Population Group
Absolute Contraindications Hypersensitivity to Mitotane or its excipients, and lactating/breastfeeding women due to the risk of infant toxicity. Concomitant use with spironolactone is also contraindicated.
Use Not Established Pediatric patients (under 18 years) do not have established safety and efficacy profiles in official labeling.
Not Recommended Use is not recommended in patients with severe hepatic impairment or severe renal impairment due to insufficient data and risk of accumulation.

Mitotane must be temporarily discontinued immediately if a patient experiences shock, severe trauma, or severe infection due to the drug's effect on adrenal function. For those with mild to moderate hepatic or renal impairment, use requires caution and close monitoring of drug plasma levels.

Pregnancy Status: Mitotane can cause fetal harm. Females of reproductive potential must use effective non-hormonal contraception throughout treatment and for a prolonged period after discontinuation, as the drug can persist in the body.

What should I know about interactions with other medicines?

Interactions with other medicines and products

The official interaction profile of Mito an is governed by its documented effects on drug metabolism and adrenal function, necessitating specific constraints for co-administered medicines and certain physical conditions.

Category Official Regulatory Statement Summary
Metabolic Mechanism Strong and durable induction of the hepatic enzyme Cytochrome P450 3A4 (CYP3A4).
Exposure Effect Decreases plasma concentration and efficacy of drugs that are major CYP3A4 substrates, which can include certain anti-cancer agents and hormonal contraceptives.
Anticoagulants Accelerates the metabolism of Warfarin and other coumarin-type anticoagulants, leading to an increase in required dose.
Steroid Replacement Increases the extra-adrenal breakdown of cortisol, requiring a compensatory increase in the dose of replacement glucocorticoid and mineralocorticoid therapy.
Food Interaction Absorption is significantly enhanced when the medication is administered with a high-fat meal or snack.

Interaction-Related Restrictions and Constraints

  • Contraindicated Combination: Co-administration with Spironolactone is strictly contraindicated by regulatory bodies as it may block the intended adrenolytic action of Mito an.
  • Timing Restriction: The medication must be temporarily discontinued immediately following shock, severe trauma, or acute infection due to the heightened risk of an adrenal crisis, a documented drug-disease interaction risk.
  • Population Note: Plasma level monitoring is specifically recommended in patients with mild to moderate hepatic or renal impairment, and in overweight patients, due to the documented potential for drug accumulation.

Mechanism of Action

How Митотан Works: Biological Mechanism

Митотан exerts its primary action through selective cytotoxicity within the adrenal cortex, particularly targeting the zona fasciculata and reticularis cells. The drug is preferentially concentrated in the mitochondria of these cells, where it disrupts the mitochondrial membranes, triggering cellular toxicity and apoptosis. This process leads to the physical destruction and atrophy (adrenolysis) of the hormone-producing tissue, causing a sustained reduction in hormone output.

Simultaneously, the drug acts as an inhibitor of key Cytochrome P450 enzymes, such as CYP11B1, which are essential for steroid biosynthesis in the adrenal gland. This enzyme inhibition directly blocks the conversion of cholesterol into cortisol and other adrenal steroids. This biochemical blockade works in conjunction with the cellular destruction to reduce the synthesis and secretion of adrenal steroids.

Additionally, Митотан induces certain hepatic enzymes in the liver, which accelerates the metabolism and clearance of circulating steroid hormones from the bloodstream, contributing to the lowering of plasma steroid concentrations.

Dosage and Administration Information

The administration of Mitotane is a standardized process. The medicine is administered via the oral route as a 500 mg tablet.


Official Administration Protocol

The official dosing regimen requires a gradual increase in the initial dose, a practice known as titration. The starting daily dose for adults typically ranges from 2 g to 6 g (2000 mg to 6000 mg) and is taken in divided doses throughout the day. The objective of this titration is to reach a therapeutic plasma concentration between 14 and 20 mg/L.

Key Use Conditions

  • Timing with Food: Mitotane is consistently administered with food, as consumption alongside high-fat meals is noted to enhance its absorption.
  • Form Integrity: The tablets must be swallowed whole and should not be crushed, chewed, or split.
  • Pediatric Use: For pediatric patients, the initial dosage is determined by body surface area, beginning at approximately 1.5 to 3.5 g/m^2/ day.

Duration and Monitoring

Treatment continues as long as a clinical benefit is observed. If no benefit is demonstrated after three months at the optimal dose, discontinuation of therapy may be considered. Due to the drug's properties, plasma levels must be monitored regularly throughout treatment and even after discontinuation. If a scheduled dose is missed, the practice is to take only the next scheduled dose and not to take a double dose.

Recent Clinical Evidence

Research evidence / Overview of Studies for Mitotane


Evidence for Use in Adrenocortical Carcinoma (ACC)

Research on Mitotane has been conducted to investigate the use of Mitotane in the research context for Adrenocortical Carcinoma (ACC), covering both advanced disease and use after surgical removal of the tumor (known as adjuvant therapy). Because ACC is a rare cancer, the body of evidence includes a mix of large-scale international Randomized Controlled Trials (RCTs) alongside many retrospective cohort studies and case reports gathered over time.

In the advanced setting, the studies monitored outcomes related to survival, such as Overall Survival and Progression-Free Survival. Research examined Mitotane, sometimes used in combination with other treatments, compared to other approaches within the study. In the post-surgical (adjuvant) setting, research was focused on how often cancer recurrence was measured, monitoring Recurrence-Free Survival.

What remains uncertain is the need for more standardized research. The rarity of ACC means that many studies necessarily involve small sample sizes, and follow-up durations for long-term outcomes are not fully established. While current evidence helps contextualize how patients have reported their experience, the results apply only to the populations studied, and data for certain treatment periods and subgroups remain insufficient.


Evidence for the Management of Hormonal Symptoms

Mitotane was also studied for conditions characterized by systemic or functional imbalance caused by endocrine overproduction from a functional ACC tumor. This typically involves the excessive production of hormones like cortisol, which is relevant in trials assessing short-term or episodic symptom patterns, such as Cushing's syndrome. Research explored short-term symptom changes in studies involving periods of heightened symptom activity, when hormone levels are high.

The research mainly consists of small prospective and retrospective studies and case reports. These studies monitored biochemical outcomes, which involves measuring changes in high hormone levels observed during the study period. Additionally, researchers documented changes in the clinical symptom presentation that reflect physiological strain or stress.


What is Still Uncertain About Mitotane Research

This section summarizes what is known—and what is still uncertain—about Mitotane research. Evidence quality varies across studies, and limitations such as small sample sizes persist due to the rarity of the condition it treats. The evidence for certain aspects, such as its role in specific low-risk disease categories or long-term management protocols, continues to be explored. Furthermore, the need to maintain specific therapeutic blood levels of Mitotane for optimal effect introduces another layer of variability in the clinical data.

Key Studies & References

  1. Treatment of advanced adrenal cortical carcinoma with mitotane (o,p'-DDD): an update
  2. WHO Anatomical Therapeutic Chemical (ATC) Classification: Mitotane (L01XX23)

Frequently Asked Questions (FAQ)

Common questions about Митотан (FAQ)


Q: How quickly is Митотан expected to start having an effect?

A: According to regulatory literature, reaching the specific drug level needed for optimal therapeutic effect (between 14 and 20 mg/L) can take a period of three to five months. Studies have shown that significant changes in hormone levels are commonly observed within the first six months of treatment.


Q: Can Митотан affect my ability to drive or operate machinery?

A: Official product information indicates that this medicine can cause central nervous system (CNS) effects, such as dizziness, confusion, and drowsiness. Regulatory information suggests avoiding driving or operating hazardous machinery if experiencing these CNS reactions.


Q: Are the side effects of Митотан reversible if the treatment is stopped?

A: Regulatory documents state that severe neurological effects are often reversible once the medicine is stopped and its concentration in the blood begins to decrease. Many other effects, including changes in hormone levels and metabolic issues, have also been reported to be reversible.


Q: Can children or adolescents use Митотан?

A: A starting dosage is specified in regulatory guidelines for use in children and adolescents, calculated based on their body surface area. However, official regulatory labeling notes that established safety and efficacy information for this patient population is currently lacking.


Q: Is there a maximum time frame that a person can be treated with Митотан?

A: Official regulatory guidance states that treatment should continue for as long as a clinical benefit is observed by the care team. While studies often recommend a minimum duration, no absolute maximum time frame is stated in the core regulatory documents.


Q: Can Митотан lead to changes in mood or personality?

A: According to the official product information, very common adverse reactions include depression and confusion. Other psychiatric adverse reactions have also been reported in association with the medicine.


Q: Are there special dietary restrictions related to taking Митотан?

A: Regulatory information does not list specific foods or dietary restrictions that must be avoided while taking the medicine. Official guidance emphasizes taking the tablets consistently with food, particularly meals high in fat, which is noted to enhance its absorption.


Q: How often do patients typically need laboratory work done while on Митотан?

A: Official guidance recommends monitoring the concentration of the medicine in the blood periodically (e.g., monthly) throughout treatment. Liver function tests and pelvic ultrasounds for premenopausal women also require regular monitoring.


Q: What types of allergic reactions are listed in the official documents for Митотан?

A: Official documents list hypersensitivity (an allergic reaction) to the medicine or its ingredients as an absolute contraindication. Additionally, a transient skin rash has been reported as a common dermatologic adverse reaction.


Q: Can Митотан affect fertility in men or women?

A: Studies and official information indicate that in women, the medicine is associated with a risk of ovarian macrocysts. In men, common side effects include decreased levels of free testosterone and the development of gynecomastia.


Q: Why are the dosages for Митотан often highly variable among patients?

A: Official guidelines require that the dosage be carefully individualized and adjusted based on the patient's tolerance and clinical need. This adjustment is designed to help the concentration of the medicine in the blood reach the specific therapeutic level of 14 to 20 mg/L.


Q: Does Митотан cause hair loss?

A: Hair loss is not listed as a very common side effect in the core prescribing information for adults. However, it has been noted as a potential side effect in educational materials, particularly those related to use in pediatric patients.


Q: Are there any common supplements or vitamins that should be avoided while taking Митотан?

A: Official information highlights the importance of discussing all medicines, herbals, and supplements with the prescribing healthcare provider. This medicine is known to affect how the liver processes other drugs, making a complete review of all co-administered substances necessary.


Q: Does Митотан have known interactions with common pain relievers?

A: Caution is advised with non-steroidal anti-inflammatory drugs (NSAIDs) such as aspirin, ibuprofen, or naproxen. Regulatory information suggests these may increase the risk of bleeding due to the medicine's effect on prolonged bleeding time.


Q: Is there a known antidote or treatment for an accidental overdose of Митотан?

A: According to the official product information, there is no known specific antidote available for an overdose. Treatment for an overdose involves general supportive measures and closely monitoring the medicine's concentration in the blood.


Q: Has research looked at the use of Митотан alongside radiation therapy?

A: Studies have investigated the combination of this medicine with radiation therapy, primarily in laboratory settings using adrenocortical cancer cell lines. This research is part of the ongoing effort to understand the medicine's potential inhibitory effects.


Q: Does alcohol consumption present a significant interaction risk with Митотан?

A: Regulatory information suggests avoiding or limiting alcohol consumption while taking the medicine. This is because alcohol may increase the risk of nervous system side effects, such as drowsiness, which are already commonly reported with the medicine.


Q: Are there any required tests that must be done before starting Митотан?

A: Official regulatory guidelines specify that liver function tests should be monitored prior to the start of treatment. Monitoring the medicine's concentration in the blood is also required for dose adjustment during the early phase of therapy.


Q: What is the potential for Митотан to interact with seizure medications?

A: Official information states that this medicine is a strong inducer of the hepatic enzyme CYP3A4, which can reduce the effectiveness of many co-administered drugs. Due to this mechanism of interaction, many co-administered medicines, including some seizure medications, should be reviewed by a healthcare provider.


Q: Does Митотан have a Black Box Warning in official documents?

A: Yes, the official FDA label contains a Boxed Warning (sometimes called a Black Box Warning) regarding the risk of adrenal crisis. This risk is heightened in the presence of shock, severe trauma, or infection.


Q: Can Митотан affect blood pressure?

A: Adverse event data indicates that this medicine has been associated with changes in blood pressure. Both high blood pressure (hypertension) and low blood pressure upon standing (orthostatic hypotension) have been reported.


Q: Does official information suggest any specific time of day is better for taking Митотан?

A: Official regulatory guidelines state that the total daily amount of medicine may be divided into two or three doses. There is no specific time of day (such as morning or night) mandated for taking the doses, only that they should be taken with meals.


Q: Can Митотан be stopped suddenly, or is a gradual decrease needed?

A: Regulatory guidelines state the medicine should be temporarily withheld immediately in emergency situations such as shock or acute infection. When stopping long-term therapy, the medicine eliminates very slowly from the body, and measurable amounts can persist for many weeks or months after the last dose.


Q: Is there a generic version of Митотан available?

A: According to current drug availability information, a generic version of the branded product (Lysodren) is not currently available in the United States.

How should Митотан be stored and disposed of?

How to Store and Dispose of Mitotane (Lysodren)

Mitotane tablets must be stored and handled according to specific regulatory requirements, reflecting its classification as a hazardous and cytotoxic medicinal product.

Storage Requirements

The medicine requires storage at Controlled Room Temperature, which is 25 C (77 F), with permitted excursions between 15 C and 30 C (59 F and 86 F). The product must be kept from freezing and protected from direct light, excess heat, and moisture. Store the tablets in the original, closed container. All Mitotane must be kept out of the sight and reach of children.

Handling and Disposal

Caregivers must wear disposable gloves when handling the tablets. Exposure to crushed or broken tablets must be avoided, and any exposed skin should be washed immediately and thoroughly. Do not flush unused or expired Mitotane down the toilet or drain. Disposal must follow local regulations for cytotoxic waste, and patients should consult their pharmacist or healthcare professional for guidance.

Attention! Always consult to a doctor or pharmacist before using pills or medicines.

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