What is Mitotane: Uses, Dosage, Side Effects and More

Mitotane is a specialized medication used to treat adrenocortical carcinoma, a rare but serious type of cancer that affects the adrenal glands. If you or someone you care about has been prescribed this medication, you're likely dealing with complex emotions and questions about what lies ahead.

This powerful cancer-fighting drug works by specifically targeting cancer cells in the adrenal cortex while also helping manage symptoms when the cancer can't be completely removed. While mitotane requires careful monitoring and can cause side effects, it's an important tool that has helped many people manage this challenging condition.

What is Mitotane?

Mitotane is an oral chemotherapy medication that belongs to a class of drugs called adrenolytic agents. It specifically targets the outer layer of your adrenal glands, called the adrenal cortex, where certain types of cancer can develop.

Your adrenal glands sit on top of your kidneys and produce important hormones like cortisol and aldosterone. When cancer develops in these glands, mitotane can help by both fighting the cancer cells and reducing the overproduction of hormones that often occurs with this type of tumor.

This medication has been used for decades and remains one of the most effective treatments available for adrenocortical carcinoma. While it's considered a strong medication that requires careful monitoring, many patients have found it helpful in managing their condition.

What is Mitotane Used For?

Mitotane is primarily prescribed for treating adrenocortical carcinoma, a rare cancer that affects about 1-2 people per million each year. Your doctor might recommend this medication in two main situations.

First, mitotane can be used after surgery to remove an adrenal tumor, even when the surgery appears successful. This approach, called adjuvant therapy, helps reduce the risk of cancer returning by targeting any remaining cancer cells that might be too small to detect.

Second, this medication can help manage advanced adrenocortical carcinoma when the cancer has spread to other parts of the body or can't be completely removed with surgery. In these cases, mitotane can help slow the cancer's growth and reduce symptoms caused by excess hormone production.

Some doctors also prescribe mitotane for Cushing's syndrome when it's caused by adrenal tumors. This condition occurs when your body produces too much cortisol, leading to symptoms like weight gain, high blood pressure, and mood changes.

How Does Mitotane Work?

Mitotane works by specifically targeting and destroying cells in the adrenal cortex, both cancerous and normal cells in this area. Think of it as a medication that has a particular attraction to adrenal tissue, allowing it to concentrate its effects where they're needed most.

The drug interferes with the production of steroid hormones in your adrenal glands, including cortisol and aldosterone. This dual action helps fight cancer cells while also reducing the excessive hormone levels that often cause troublesome symptoms in patients with adrenal tumors.

This is considered a strong medication because it can significantly impact your adrenal function. While this targeted approach is what makes mitotane effective against adrenal cancer, it also means you'll need hormone replacement therapy to maintain normal body functions.

The medication builds up in your fatty tissues over time, which means it continues working even after you stop taking it. This characteristic helps maintain its cancer-fighting effects but also means side effects can persist for weeks or months after treatment ends.

How Should I Take Mitotane?

Mitotane should be taken exactly as prescribed by your oncologist, typically starting with a lower dose that gradually increases over time. Your doctor will carefully monitor your blood levels and adjust the dosage to find the right balance between effectiveness and manageable side effects.

Take mitotane with food, preferably with meals that contain some fat, as this helps your body absorb the medication more effectively. Many patients find it helpful to take the medication at the same times each day to maintain consistent levels in their system.

Most people start with 2-6 grams per day, divided into 3-4 doses throughout the day. Your doctor might increase this gradually, sometimes up to 8-10 grams daily, depending on how well you tolerate the medication and your blood levels.

It's important to stay well-hydrated while taking mitotane and to avoid alcohol, as both can affect how your body processes the medication. Your healthcare team will provide specific guidance about any foods or other medications to avoid.

How Long Should I Take Mitotane For?

The duration of mitotane treatment varies significantly depending on your specific situation and how well you respond to the medication. Some patients take it for several months, while others may need it for years.

If you're taking mitotane after surgery to prevent cancer recurrence, treatment typically continues for 2-5 years, provided you're tolerating it well and your blood levels remain appropriate. Your doctor will regularly assess whether continuing treatment is beneficial for your particular case.

For advanced adrenocortical carcinoma, treatment often continues as long as the medication is helping control the cancer and you're managing the side effects reasonably well. Your healthcare team will monitor your progress through regular scans and blood tests.

Never stop taking mitotane suddenly without discussing it with your doctor first. Because the medication stays in your system for weeks or months, your hormone replacement therapy and monitoring schedule may need adjustment even after you stop taking it.

What Are the Side Effects of Mitotane?

Mitotane can cause various side effects because it affects your adrenal glands' normal function, but understanding what to expect can help you prepare and manage them effectively. Most side effects are related to the medication's impact on hormone production and your nervous system.

Here are the most common side effects you might experience:

• Digestive issues: Nausea, vomiting, diarrhea, and loss of appetite are very common, especially when starting treatment or increasing doses
• Neurological symptoms: Dizziness, confusion, fatigue, and coordination problems can occur as the medication affects your nervous system
• Adrenal insufficiency: You'll need hormone replacement therapy because mitotane reduces your natural hormone production
• Skin changes: Skin rash, flushing, or increased sensitivity to sunlight may develop
• General fatigue: Many patients experience tiredness and weakness, particularly in the first few weeks of treatment

These common side effects often improve as your body adjusts to the medication and your hormone replacement therapy is optimized. Your healthcare team will work closely with you to manage these effects.

Some less common but more serious side effects require immediate medical attention. While these occur in a smaller percentage of patients, it's important to be aware of them:

• Severe neurological symptoms: Significant confusion, memory problems, or difficulty with coordination that interferes with daily activities
• Adrenal crisis: Severe weakness, nausea, vomiting, and low blood pressure that can be life-threatening without prompt treatment
• Liver problems: Elevated liver enzymes, yellowing of skin or eyes, or severe abdominal pain
• Severe allergic reactions: Difficulty breathing, severe rash, or swelling of face and throat

Your doctor will monitor you closely through regular blood tests and check-ups to catch any concerning changes early. Most side effects are manageable with proper support and adjustments to your treatment plan.

Who Should Not Take Mitotane?

Mitotane isn't suitable for everyone, and your doctor will carefully evaluate whether it's the right choice for your specific situation. Certain health conditions and circumstances make this medication either unsafe or less effective.

You should not take mitotane if you have a known allergy to the medication or any of its ingredients. People with severe liver disease may not be able to process the medication safely, as mitotane can further stress liver function.

Pregnancy presents special considerations because mitotane can harm a developing baby. Women who are pregnant or planning to become pregnant should discuss alternative treatments with their healthcare team. Both men and women should use effective contraception while taking this medication.

If you're breastfeeding, mitotane can pass into breast milk and potentially harm your baby. Your doctor will discuss the risks and benefits and help you decide on the safest approach for both you and your child.

Certain medical conditions require extra caution when considering mitotane treatment. People with severe kidney disease, active infections, or significant mental health conditions may need modified treatment approaches or additional monitoring.

Mitotane Brand Names

Mitotane is available under the brand name Lysodren in most countries, including the United States. This is the most commonly prescribed form of the medication and has been used safely for decades.

In some regions, you might find mitotane available under different brand names or as generic versions. However, because this medication requires precise dosing and monitoring, it's important to stay with the same brand or formulation unless your doctor specifically approves a change.

Your pharmacy should always dispense the same brand or generic version to ensure consistency in your treatment. If you notice any differences in the appearance of your medication, check with your pharmacist or healthcare provider before taking it.

Mitotane Alternatives

While mitotane remains the primary treatment for adrenocortical carcinoma, several other options might be considered depending on your specific situation and how well you tolerate mitotane.

For patients who can't tolerate mitotane or don't respond well to it, other chemotherapy medications like etoposide, doxorubicin, cisplatin, or streptozocin might be used either alone or in combination. These alternatives work differently than mitotane but can still help fight adrenal cancer.

Newer targeted therapies and immunotherapy drugs are being studied for adrenocortical carcinoma, though these are typically available through clinical trials or for specific situations. Your oncologist can discuss whether any of these newer options might be appropriate for your case.

For managing hormone-related symptoms, medications like ketoconazole, metyrapone, or etomidate can help reduce excessive hormone production without directly fighting cancer cells. These might be used alongside or instead of mitotane in certain situations.

Is Mitotane Better Than Other Adrenal Cancer Treatments?

Mitotane is considered the gold standard treatment for adrenocortical carcinoma because it's the most extensively studied medication for this rare cancer. Decades of research have shown it can help extend survival and improve quality of life for many patients.

Unlike other chemotherapy drugs that affect cells throughout your body, mitotane specifically targets adrenal tissue, making it particularly effective for adrenal cancers. This targeted approach often makes it more effective than general chemotherapy drugs for this specific type of cancer.

However, "better" depends on your individual situation, overall health, and how well you tolerate the medication. Some patients respond better to combination treatments that include mitotane plus other chemotherapy drugs, while others do well with mitotane alone.

Your oncologist will consider factors like the stage of your cancer, your overall health, previous treatments, and your personal preferences when recommending the best treatment approach for your specific case.