How Does Chemotherapy Work for Mesothelioma?

How Chemotherapy Treats Mesothelioma

Chemotherapy is a systemic treatment that uses powerful drugs to kill cancer cells or prevent them from dividing. Unlike surgery, which targets a specific area, chemotherapy circulates throughout the body and can reach cancer cells wherever they are located. For mesothelioma, chemotherapy may be used as the primary treatment, before surgery (neoadjuvant), after surgery (adjuvant), or in combination with other therapies.

The drugs work by interfering with the cell division process. Because cancer cells divide more rapidly than most normal cells, they are more susceptible to chemotherapy. However, some healthy cells that also divide quickly — such as those in the bone marrow, digestive tract, and hair follicles — are also affected, which accounts for many of the side effects associated with treatment.

Standard Chemotherapy Regimen

The standard first-line chemotherapy for mesothelioma is a combination of pemetrexed (brand name Alimta) with a platinum-based drug, either cisplatin or carboplatin. This combination was established as the standard of care after a pivotal 2003 clinical trial demonstrated that pemetrexed plus cisplatin significantly improved survival compared to cisplatin alone.

Treatment is typically administered intravenously in 21-day cycles. Most patients receive 4–6 cycles, with each infusion session lasting several hours. Carboplatin may be substituted for cisplatin in patients who cannot tolerate cisplatin’s side effects, particularly kidney toxicity. Patients also receive folic acid and vitamin B12 supplementation to reduce toxicity.

When Chemotherapy Is Used

Chemotherapy can serve different roles depending on the overall treatment plan. As neoadjuvant therapy, it is given before surgery to shrink tumors and make them easier to remove. As adjuvant therapy, it is administered after surgery to kill remaining microscopic cancer cells. For patients who are not surgical candidates, chemotherapy may be the primary treatment approach.

Chemotherapy is also a key component of multimodal therapy, where it is combined with surgery and/or radiation. For peritoneal mesothelioma, heated chemotherapy may be delivered directly into the abdominal cavity during HIPEC surgery.

Effectiveness and Response Rates

The pemetrexed-cisplatin combination produces a partial or complete response in approximately 40% of patients, with disease stabilization in an additional 40%. Median overall survival with first-line chemotherapy is approximately 12–16 months, though individual outcomes vary significantly based on cell type, stage, and patient health.

For patients whose mesothelioma progresses after first-line chemotherapy, immunotherapy with nivolumab and ipilimumab has emerged as an important second-line option. Clinical trials continue to explore new drug combinations and sequencing strategies.

Managing Treatment and Costs

Chemotherapy for mesothelioma can cost tens of thousands of dollars per cycle. Patients whose mesothelioma was caused by asbestos exposure may be eligible for compensation that can help cover treatment costs. A mesothelioma attorney can explain the legal options available while you focus on your health.