Cisplatin and Etoposide: What to Expect

Cisplatin is a platinum compound. It sticks to DNA and forms cross-links that a dividing cell cannot repair. Etoposide blocks topoisomerase II, an enzyme that untangles DNA strands while a cell copies them. Because the two drugs damage cells by separate routes, they are paired rather than used alone. On charts and consent forms the pair is written EP or PE.

One detail surprises people. The FDA label for etoposide injection does list small cell lung cancer as a first-line use, in combination with other approved drugs. Cisplatin's label does not. Cisplatin is approved for advanced testicular cancer, advanced ovarian cancer, and advanced bladder cancer. Its use in lung cancer rests on decades of trial data and guideline agreement, not on the package insert. This is routine in cancer care, but it is useful to know if an insurer questions the claim.

A cycle usually runs 21 days. Cisplatin is given on day 1. Etoposide is given across the first several days.

Doses are written per square meter of body surface area, shortened to mg/m2. That figure comes from your height and weight, so no two people get the same milligram number. The etoposide label sets out a range for small cell lung cancer, given daily for four or five days in a row. Many cancer centers instead use a larger daily dose over 3 days. Ask the infusion pharmacist for the exact numbers on your own order.

Cisplatin dosing on the label is listed by approved use, and the pattern differs: daily for five days in testicular cancer, and a single larger dose every 3 to 4 weeks in ovarian and bladder cancer. Lung regimens sit in the same broad range.

Etoposide has to be diluted within a narrow range of strengths. Any more concentrated and the drug can fall out of solution. It runs over 30 to 60 minutes and is never pushed quickly, because fast injection has caused a brief drop in blood pressure in 1% to 2% of patients.

Cisplatin cannot be given dry. The label requires fluid before the drug and says urine output must be kept up for a full 24 hours afterward. Expect saline first, saline again at the end, and often magnesium and potassium added to the bag.

Cisplatin at the higher end of its dose range counts as highly emetogenic, which means vomiting is expected without prevention rather than merely possible. The National Cancer Institute's summary for clinicians describes a four-drug block: an NK-1 receptor blocker such as aprepitant or its intravenous form fosaprepitant, a 5-HT3 blocker such as palonosetron or ondansetron, the steroid dexamethasone, and olanzapine. In the trial NCI cites, olanzapine was 10 mg by mouth on days 1 through 4. Add the fluids and the pre-medicines and a first day can fill six to eight hours. Bring food and a phone charger.

Olanzapine is one you would swallow at home in the days after the drip, so the timing matters. Take it on the days your own team wrote down, at the amount on your prescription, even if you are not being sick; it works best used as prevention.

Cisplatin carries one boxed warning covering kidney injury, peripheral neuropathy, nausea and vomiting, and myelosuppression.

Kidney damage is dose-related and builds up. The label notes it typically starts during the second week after a dose, which is why creatinine, BUN, creatinine clearance, and electrolytes including magnesium are checked before the first cycle and again later. Magnesium wasting is common enough that the label names supplements directly. Kidney problems during cancer treatment covers what those numbers mean.

Peripheral neuropathy means numbness, tingling, or burning that starts in the fingers and toes. The label says to consider stopping cisplatin permanently for grade 3 or grade 4 neuropathy, meaning symptoms that limit self-care.

Myelosuppression, a drop in blood cells made by the marrow, occurs in 25% to 30% of people on cisplatin. Etoposide adds to it. Low white blood cells during chemotherapy explains the timing of the dip.

Hearing loss is a separate warning, not part of the boxed one. It begins in the high frequencies, 4,000 to 8,000 Hz, the band that carries consonant sounds. People notice trouble following speech in a noisy room before anyone orders a hearing test. The damage is cumulative and often permanent. In children the estimated rate is 40% to 60%, and risk is highest under age 5. See hearing loss and tinnitus from cisplatin.

For limited-stage small cell lung cancer, EP is often paired with chest radiation given concurrently. NCI's clinician summary reports Intergroup 0096, which compared twice-daily radiation to 45 Gy over three weeks against once-daily 45 Gy over five weeks, both with cisplatin and etoposide. Five-year survival was 26% with twice-daily and 16% with once-daily. Esophagitis, painful swelling of the swallowing tube, was worse on the twice-daily arm. NCI also notes that finishing radiation in under 30 days was linked to better five-year survival, with a relative risk of 0.62.

Age changes the math. In the EST-3588 trial, treatment-related death was 1% in people under 70 and 10% in those 70 or older.

A Hellenic Oncology Group trial compared cisplatin plus etoposide with carboplatin plus etoposide. Median survival was 11.8 months with cisplatin and 12.5 months with carboplatin. The difference was not significant, and NCI notes the study was too small to prove the two are equal. Carboplatin is gentler on kidneys, hearing, and nerves but harder on blood counts. Lung cancer treatment by stage shows where each fits.

• Call your cancer team without delay if your temperature reaches 100.4 degrees F (38 C). Etoposide flattens the white cells that fight infection, and CDC treats a fever during chemotherapy as an emergency, so this is a call to make at once, at any hour, and not a message left for the morning. If the team cannot be reached quickly, go to an emergency department and say you are on chemotherapy. Two federal pages differ on the number. MedlinePlus, reviewed in October 2024, uses 100.4 F. NCI's infection page, reviewed in January 2020, uses 100.5 F. The lower and newer number is the safer trigger.
• Call your care team the same day if you pass much less urine than usual, or none for 8 hours. Call the same day too if you cannot keep fluids down for 24 hours after leaving the infusion center. Both put the kidneys at risk.
• Call your care team within a day or two if new ringing in the ears, muffled hearing, or dizziness appears. Do the same if numbness or tingling spreads past the fingertips, or makes buttons and stairs hard.

• https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=508496cb-3441-46b3-a4fe-e0d440e6adc6
• https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=fe870629-104d-4d67-a7c6-f53bc588121e
• https://www.cancer.gov/types/lung/hp/small-cell-lung-treatment-pdq
• https://www.cancer.gov/about-cancer/treatment/side-effects/nausea/nausea-hp-pdq
• https://www.cancer.gov/about-cancer/treatment/side-effects/infection
• https://medlineplus.gov/ency/patientinstructions/000913.htm
• https://www.cdc.gov/cancer-preventing-infections/patients/fever.html