Lysodren

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Lysodren

Medically reviewed

Marina Burgos

Last updated on 22/12/2025

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 Lysodren

Property Description
Active ingredient Mitotane
Form Tablet (oral administration)
Pharmacological class Antineoplastic agent, adrenocorticolytic agent
General purpose Management of abnormal adrenal cell growth and hormone production
Origin Synthetic compound (o,p'-DDD derivative)

Defining Lysodren: The Core Identity and Composition

Lysodren is a potent, prescription-only medication whose active component is the substance Mitotane (INN), a highly specialized synthetic compound. Mitotane is a derivative of o,p'-DDD, an adrenolytic isomer chemically related to dichlorodiphenyl-dichloroethane. The product is supplied as an oral tablet and functions as a single-ingredient product, confirming that the entire therapeutic effect relies solely on the systemic action of Mitotane, administered through the gastrointestinal tract.

Mitotane’s Classification: Antineoplastic and Adrenocorticolytic Agent

Mitotane is uniquely classified as both an antineoplastic agent (a compound used against abnormal cell growth) and, more specifically, an adrenocorticolytic agent. This specific classification reflects the drug's capability to selectively destroy or disrupt the cells of the adrenal cortex, the outer layer of the adrenal glands. This compound possesses specialized adrenolytic properties in this tissue. The selective toxicity against adrenal cortical tissue is a distinctive feature of the compound.

General Therapeutic Purpose

The overarching therapeutic purpose of Lysodren is the management of conditions associated with the uncontrolled proliferation and excessive output of steroid hormones by the adrenal cortex. By performing its primary adrenocorticolytic function, the drug aims to reduce the mass of the affected tissue while concurrently addressing the resulting overproduction of hormones. This process of targeted cellular destruction and hormone output suppression supports the stabilization of the patient's condition, such as reducing the metabolic effects caused by excess cortisol, which is a key therapeutic goal.

Regulatory References

  1. MedlinePlus Drug Information

What side effects are possible with Lysodren?

Possible Side Effects and Safety Information: Lysodren

The safety profile of Lysodren (Mitotane) is officially documented by government regulatory agencies and is characterized by a range of adverse effects across multiple body systems.

Documented Adverse Reactions

The most frequently reported adverse reactions are commonly related to the Gastrointestinal and Nervous System disorders. According to regulatory labeling, side effects that may occur frequently (classified as Common or Very Common) include anorexia, nausea, vomiting, diarrhea, dizziness, somnolence, and asthenia (unusual weakness).

Less frequently, adverse reactions affecting the Endocrine system (such as hypothyroidism and adrenal insufficiency), Metabolism (hypercholesterolemia), and Hepatobiliary systems are reported.

Serious Safety Considerations

Official regulatory documents highlight the potential for several serious adverse reactions:

  • Adrenal Crisis: The risk of acute adrenocortical insufficiency is a major safety concern, particularly following severe trauma, infection, or shock, requiring temporary discontinuation of the medication.
  • Central Nervous System (CNS) Toxicity: Severe, potentially reversible CNS effects, including confusion and impaired function, have been associated with high concentrations of Mitotane in the blood.
  • Hepatotoxicity: Cases of severe liver injury, including autoimmune hepatitis, have been documented.

Population-Specific Safety Notes

The medication is officially contraindicated during lactation and should not be used in individuals with known hypersensitivity to the active substance. Furthermore, Mitotane is classified as potentially causing fetal harm, and specific precautions regarding effective contraception are mandated for females of reproductive potential. Its use is also not recommended for patients with severe hepatic or renal impairment.

Overdose and Emergency Response

Overdose and when to seek help

Suspected or confirmed Lysodren (Mitotane) overdose requires immediate medical attention. Contacting emergency medical services is a regulatory mandate upon the recognition of severe or potentially life-threatening symptoms associated with excessive exposure.

Documented Overdose Manifestations

Overdose is documented to present as an exacerbation of the drug’s known toxicities, specifically severe disturbances affecting the Gastrointestinal (GI) system and the Central Nervous System (CNS). The official labeling describes the following manifestations:

  • CNS Effects: Include somnolence, lethargy, and may progress to profound CNS depression.
  • GI Effects: Severe nausea, vomiting, and diarrhea are frequently documented.
  • Severe Risk: The primary severe risk is the precipitation of acute adrenocortical insufficiency (adrenal crisis), which is considered life-threatening.

Official Management and Monitoring

In an overdose situation, Lysodren must be discontinued immediately. The official regulatory prescribing information states that no specific antidote is known for Mitotane. Management is restricted to symptomatic and supportive treatment.

Close medical observation is required because Mitotane's lipophilicity and long half-life mean that toxic effects can be delayed and prolonged. Mandatory monitoring includes vital signs, key organ functions (renal, hepatic, and adrenocortical), and Mitotane plasma concentrations to guide ongoing supportive care.

Therapeutic Uses of Lysodren

What Lysodren Treats: Main Uses and Benefits

Lysodren is commonly used for the management of adrenocortical carcinoma (ACC), particularly in contexts where the disease is advanced, including when the tumor is inoperable or has metastasized. It is also considered relevant in the adjuvant setting following surgery to support a reduction in the risk of recurrence. The core therapeutic benefit contributes to the management of this malignant disease, which may assist with stabilizing the patient’s condition and supports general well-being during symptomatic phases.

The medication is considered relevant for the management of inoperable adrenocortical carcinoma of both functional (hormone-secreting) and nonfunctional types. A significant benefit is applied in addressing debilitating symptoms that arise from the excessive steroid hormones secreted by a functional adrenal tumor. This action may assist with maintaining functional stability and offers symptomatic relief from distressing physical and metabolic symptoms.


Quick Fact: Relief for Hormonal Overactivity
This medication is applied in situations involving symptoms related to systemic imbalance, specifically the high levels of cortisol that can disrupt daily functioning in patients with hormone-secreting adrenal tumors.

Eligibility and Restrictions for Use

Lysodren (mitotane) eligibility is strictly defined by regulatory documents, establishing specific populations who are prohibited from use or who require conditional use.

Eligibility Scope

Classification Population/Condition
Use is Allowed Patients with inoperable or metastatic adrenocortical carcinoma (ACC).
Contraindicated Individuals with known hypersensitivity to mitotane or its excipients.
Contraindicated Women who are breastfeeding (lactation).
Contraindicated Patients concurrently receiving Spironolactone (European/Canadian labeling).
Not Recommended Patients with severe hepatic impairment (liver disease).
Not Recommended Patients with severe renal impairment (kidney disease).
Not Recommended Pregnant women due to the potential for fetal harm.

Age-Related and Conditional Rules:

  • Pediatric Use: Safety and effectiveness in pediatric patients have not been established.
  • Geriatric Use: Caution should be exercised in older patients due to insufficient data to determine if their response differs from younger adults.
  • Conditional Use: Patients with mild to moderate hepatic or renal impairment may use the medicine but require caution and close monitoring.
  • Temporary Discontinuation: The medicine must be temporarily discontinued immediately in patients experiencing shock, severe trauma, or infection.

What should I know about interactions with other medicines?

Interactions with other medicines and products — official regulatory information for Lysodren

The interaction profile of Lysodren (Mitotane) is primarily defined by its documented effect as a strong and persistent inducer of the Cytochrome P450 3A4 (CYP3A4) enzyme.

Interaction Scope

Classification Interacting Agents / Requirement
Contraindicated Combination Co-administration with Spironolactone is officially prohibited due to the risk of pharmacological antagonism.
Metabolic Acceleration Mitotane reduces the plasma concentration of co-administered medicines that are substrates of CYP3A4.
Pharmacodynamic/Metabolic Effects Coumarin-Type Anticoagulants (e.g., Warfarin) and Oral Contraceptives may experience increased metabolism, which requires close monitoring or necessitates alternative non-hormonal contraception.
Food Interaction Administration with fat-containing food is documented to increase the absorption and bioavailability of Mitotane.
Dose Adjustment Requirement Replacement Glucocorticoid and Mineralocorticoid Steroids require increased replacement doses due to Mitotane's effect on their metabolism.

Connection to the Overall Interaction Profile

Regulatory documents specify that Mitotane's strong enzyme-inducing activity leads to reduced systemic exposure for many co-administered medicines that are metabolized by the CYP3A4 pathway. This profile establishes constraints, including the formal prohibition of combining the medicine with Spironolactone. The official labeling mandates procedural constraints, such as the required increase in the dosage of adrenal steroid replacement therapy to manage the documented interaction effects.

Mechanism of Action

Lysodren, whose active ingredient is mitotane, functions through targeted cellular action and influence on hormonal synthesis primarily within the adrenal cortex. Its complex mechanism involves several key mechanistic domains.


Adrenocortical Cytotoxicity

This domain describes the drug's selective toxic action on cells of the adrenal cortex, particularly within the inner layers (zona fasciculata and reticularis). Mitotane's active metabolite induces damage to mitochondrial structures and inhibits cytochrome P450 enzymes, promoting subsequent cellular apoptosis.


Steroidogenesis Inhibition

This mechanism covers the direct suppression of adrenal hormone production, such as cortisol and aldosterone. Mitotane inhibits key enzymes in the steroid synthesis pathway, including CYP11A1 and CYP11B1, resulting in the modulation of circulating steroid hormone levels via reduced synthesis.


Peripheral Steroid Metabolism

The drug engages mechanisms that alter the processing of existing steroids in extra-adrenal tissues. Mitotane can induce hepatic microsomal enzymes, thereby accelerating the metabolic clearance of circulating steroids. The enhanced clearance contributes to shifts in the concentration of circulating steroids.

Dosage and Administration Information

Lysodren (mitotane) is a potent, cytotoxic medication for oral administration and must be used strictly according to established protocols under the supervision of a suitably experienced specialist.

Dosage and Plasma Monitoring

The goal of dosing is to achieve and maintain a Mitotane plasma concentration in the target therapeutic window of 14 to 20 mg/L.

Dosing Parameter Standard Guidelines
Initial Adult Dose 2 g to 6 g daily, administered in three or four divided doses.
Titration Method Dose is increased progressively based on plasma levels and patient tolerance, assessed at frequent intervals (e.g., every two weeks) until the target level is reached.
Maximum Plasma Level Levels exceeding 20 mg/L should generally not be reached due to potential toxicity.
Maintenance Monitoring Once the target plasma level is reached (usually within 3 to 5 months), levels should be monitored periodically (e.g., monthly).

Administration and Handling Instructions

Lysodren tablets must be taken with food, and intake should be with fat-rich food to enhance absorption. The timing of the dose relative to meals should be consistent. The 500 mg tablets must be swallowed whole and must not be crushed, chewed, or split.

Due to the cytotoxic nature of the drug, caregivers are advised to wear disposable gloves when handling the tablets. If a dose is missed or the patient vomits after taking a dose, standard instructions involve skipping the missed dose and taking the next dose as scheduled, without doubling up.

Recent Clinical Evidence

Recent Clinical Evidence for Mitotane (Lysodren)

Lysodren (mitotane) is a medication indicated for the treatment of adrenocortical carcinoma (ACC), a rare cancer of the adrenal glands. Research is continually exploring its use, particularly in combination with other treatments and in various stages of the disease.

Adjuvant Treatment Studies

Clinical trials have investigated the use of mitotane as adjuvant therapy (treatment given after the primary therapy, such as surgery) to help reduce the risk of cancer recurrence.

  • Low-to-Intermediate Risk: The ADIUVO randomized phase III trial evaluated adjuvant mitotane versus observation in patients with ACC who had a low or intermediate risk of recurrence following surgery. Study results indicated that patients in this specific risk group generally showed a better prognosis than initially expected, and the trial did not find a significant recurrence-free survival benefit from the routine use of adjuvant mitotane in this subset.

Advanced Disease and Monitoring

In the setting of advanced ACC (unresectable, relapsed, or metastatic disease), mitotane may be used as monotherapy or combined with chemotherapy regimens. Research has repeatedly demonstrated the importance of therapeutic drug monitoring.

  • Plasma Concentration: Multiple studies have suggested a potential relationship between achieving specific plasma concentrations of mitotane (often cited as 14-20, mg/L) and achieving a clinical response, although responses have been observed across a wider range. These findings contribute to the available research literature regarding individualized treatment strategies.

Frequently Asked Questions (FAQ)

Common questions about Lysodren (FAQ)

Q: Is Lysodren considered a type of chemotherapy or an endocrine drug?

A: Official documents describe Lysodren as an adrenal cytotoxic agent, meaning it acts to destroy certain cells in the adrenal cortex. It also functions as a steroidogenesis inhibitor, which means it affects the body's hormone production within the adrenal cortex.

Q: How long does it usually take for Lysodren to start having an effect?

A: Achieving a clinical benefit with Lysodren can take time. Official reports suggest that in some cases, a measurable response required more than 3 months of treatment at the maximum tolerated dose. Official guidelines state that treatment duration is determined by observed clinical benefits.

Q: Why do official documents say the exact way Lysodren works is not fully understood?

A: While regulatory documents detail that Lysodren acts as an adrenal cytotoxic agent and steroidogenesis inhibitor, they also state that its exact biochemical mechanism of action is unknown. This acknowledges the complexity involved in how the drug fully works within the body.

Q: What are the potential effects of Lysodren on the nervous system, such as causing dizziness or trouble with balance?

A: Lysodren can cause effects on the central nervous system (CNS). Common effects reported include dizziness, somnolence (drowsiness), lethargy, and vertigo (a sensation of spinning or trouble with balance). Official warnings also document the potential for severe CNS effects, including confusion.

Q: Does Lysodren have known interactions with blood thinners like warfarin?

A: Yes, Lysodren has been reported to affect the metabolism of certain blood thinners, specifically coumarin-type anticoagulants, such as warfarin. This effect is noted to potentially lead to an increase in dosage requirements for the anticoagulant.

Q: Does Lysodren interact with any common foods or beverages?

A: Official information specifies that Lysodren should be taken with food. This is because administration with fat-rich food enhances the absorption and bioavailability of the drug, allowing the body to take in more of the medicine.

Q: What types of clinical studies have been done on the efficacy of Lysodren?

A: The use of Lysodren has been researched in the context of adrenocortical carcinoma (ACC). Studies have investigated its role as adjuvant therapy (treatment given after initial therapy like surgery) and as monotherapy or in combination regimens for advanced stages of the disease.

Q: Does Lysodren only treat functional adrenal tumors, or non-functional ones as well?

A: Regulatory documents state that Lysodren is indicated for the treatment of inoperable adrenocortical carcinoma (ACC) that is either functional (producing excess hormones) or nonfunctional (not producing excess hormones).

Q: Is Lysodren intended for short-term or long-term use?

A: Official guidelines indicate that Lysodren treatment should be continued for as long as clinical benefits are observed. The duration of treatment is guided by observed clinical benefits, rather than a fixed timeline.

Q: Is it normal to feel constantly tired or fatigued while taking Lysodren?

A: Yes, feelings of unusual weakness, lack of energy (asthenia), and somnolence (drowsiness) are listed among the frequently reported adverse reactions in official documents.

Q: Can Lysodren cause changes in a person's mood or mental state?

A: Yes, official sources list mental depression and confusion among the possible adverse effects related to the central nervous system (CNS) effects of Lysodren. Official information advises individuals to report any changes in mood or mental state to their healthcare provider.

Q: Can Lysodren affect vision, such as causing blurred or double vision?

A: Yes, Lysodren can cause changes in vision. Official documentation lists blurred vision or double vision as possible adverse reactions related to its effects on the nervous system.

Q: How does Lysodren potentially affect cholesterol and fat levels in the blood?

A: Official documents list hypercholesterolemia (elevated cholesterol levels) as a possible adverse reaction. Additionally, the drug must be taken with fat-rich food because the fat helps the body absorb the medicine more effectively.

Q: Is it possible for Lysodren to cause skin rashes or other skin changes?

A: Yes, skin rash is listed as a common adverse reaction in official safety documents. Official reports also list other possible skin changes, such as areas of darkened skin.

Q: Why is 'adrenal insufficiency' listed as a serious possible effect of Lysodren?

A: Adrenal insufficiency is a serious risk because LYSODREN's intended action on the adrenal cortex can cause the glands to stop making enough corticosteroid hormones. Management of this risk often involves the use of replacement steroids, as noted in regulatory documents.

Q: What is the difference between adrenal insufficiency and adrenal crisis related to Lysodren?

A: Adrenal insufficiency is the general risk that the adrenal glands stop making enough hormones. Adrenal crisis is a more severe, life-threatening event where the glands suddenly fail, often triggered by stressful events like shock, severe trauma, or infection.

Q: Is it a safety concern if I am taking Lysodren and start a new over-the-counter medicine?

A: Official patient information advises telling your healthcare provider about all medicines you take, including prescription and over-the-counter medicines, as they may affect how Lysodren works or increase the risk of side effects.

Q: Can Lysodren interact with hormonal birth control methods?

A: Yes, official safety information states that Lysodren can interact with and render hormonal contraceptives ineffective. Females of reproductive potential are advised to use effective nonhormonal contraception.

Q: Is there a concern about taking Lysodren with herbal supplements or vitamins?

A: Official patient information advises telling your healthcare provider about all medicines, including herbal supplements and vitamins, as they may have an unknown interaction or affect how Lysodren works in your body.

Q: Who is generally considered eligible to be prescribed Lysodren?

A: Lysodren is indicated for the treatment of patients with inoperable adrenocortical carcinoma (ACC), whether the tumor is functional or nonfunctional. Official information indicates that use is generally not recommended for patients with severe hepatic or renal impairment.

Q: Can Lysodren be used in children or pediatric patients?

A: Yes, Lysodren has established starting doses for use in children and adolescents, with specific monitoring requirements. While there are established starting doses for this population, all treatment decisions are made by a specialist.

Q: Why do patients sometimes need to stop taking Lysodren for a few days?

A: Lysodren may be temporarily discontinued immediately following stressful events like shock, severe trauma, or infection. It may also be temporarily stopped or the dose reduced in cases of severe side effects or if blood levels are too high.

Q: Does Lysodren have a long half-life in the body?

A: Yes, Lysodren has a very long terminal plasma half-life, which refers to the time it takes for the drug concentration in the body to be reduced by half. This period has been reported to range from 18 to 159 days.

Q: What does the term 'titration' mean in relation to starting Lysodren?

A: In the context of Lysodren, titration is the process where the initial dose is slowly and progressively increased over a period of time. This gradual increase is based on monitoring the drug's concentration in the blood and how the patient tolerates the drug.

Q: Can Lysodren cause changes in a patient's thyroid function?

A: Yes, official safety information documents list hypothyroidism (a condition where the thyroid gland does not make enough thyroid hormones) as a possible adverse reaction.

Q: Why are patients taking Lysodren advised to wear a medical alert tag?

A: Patients are advised to consider wearing a medical alert tag due to the potential risk of developing adrenal insufficiency. This tag provides critical information to emergency medical personnel in case of a life-threatening adrenal crisis.

Q: What are the official recommendations if a person taking Lysodren develops an infection?

A: If an infection or other severe illness occurs, patients should immediately contact their healthcare provider. Regulatory documents state that Lysodren should be temporarily discontinued following an infection or severe illness.

Q: Is Lysodren available as a generic medicine (mitotane)?

A: The active ingredient in Lysodren is mitotane. According to regulatory data, there is currently no FDA-approved generic version (mitotane) available in the United States.

Q: Where does the drug name mitotane come from in official documents?

A: Mitotane is the International Nonproprietary Name (INN) of the active ingredient. Chemically, it is described in official sources as an isomer of the insecticide dichlorodiphenyldichloroethane (DDD).

Q: Do patients typically experience weight changes while on Lysodren therapy?

A: Official patient information lists weight loss as a possible sign of developing adrenal gland problems while on Lysodren therapy. Official information advises individuals to report any unexpected or significant changes in weight to their healthcare provider.

Q: Why is it noted that Lysodren is a 'hazardous drug'?

A: Lysodren is classified as a cytotoxic drug by regulatory agencies. This classification requires special procedures for its handling, storage, and disposal by both healthcare providers and caregivers to minimize exposure.

How should Lysodren be stored and disposed of?

How to Store and Dispose of Lysodren (Mitotane)

Lysodren must be stored and handled according to strict regulatory requirements due to its classification as a cytotoxic drug.

Storage Conditions

Lysodren tablets must be stored at Controlled Room Temperature, specifically 25 C (77 F), with allowable temperature variations between 15 C and 30 C (59 F and 86 F). The medication must be kept in the original container and stored strictly out of the sight and reach of children.

Handling and Disposal

Caregivers must wear disposable gloves when handling the tablets to minimize the risk of dermal exposure. It is mandatory to avoid exposure to crushed or broken tablets. If skin contact occurs, wash the area immediately and thoroughly. Any unused or expired product must be disposed of in accordance with local requirements for cytotoxic pharmaceutical waste.

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

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