OnCo

Pembrolizumab + pemetrexed + platinum

Checked 2026-09-09

Metastatic non-squamous NSCLC without EGFR/ALK alteration, first line, any PD-L1

One cycle

every 21 days × 4 · about 12 weeks in total
178141521Pembrolizumab: 200 mg, IntravenousPembrolizumabPemetrexed: 500 mg/m², IntravenousPemetrexedCarboplatin AUC 5 or cisplatin 75 mg/m²: day 1, cycles 1-4, IntravenousCarboplatin AUC 5 or ci…
21-day cycle × 4 with platinum, then pembrolizumab + pemetrexed maintenance up to 35 cycles (about 12 weeks)Intravenous

Components

DrugDoseRouteDays
Pembrolizumab
Monoclonal antibody (anti-PD-1)
200 mgIVD1
Pemetrexed
Cytotoxic (antifolate)
500 mg/m²IVD1
Carboplatin AUC 5 or cisplatin 75 mg/m²
Cytotoxic chemotherapy (platinum)
day 1, cycles 1-4IVD1
Cycles
4 with platinum, then pembrolizumab + pemetrexed maintenance up to 35 cycles
21-day cycle
Emetogenicity
Moderate (30-90%)
G-CSF
Not routine

Notes

  • Folic acid, vitamin B12 and dexamethasone premedication for pemetrexed.
  • Cisplatin makes the regimen highly emetogenic.

Used in

Source

KEYNOTE-189, NEJM 2018

Reference doses for a typical adult from the cited protocol or label. Doses are adjusted for renal and hepatic function, age, performance status and prior toxicity, and institutional protocols vary. Verify against the current label and your local protocol before treating. Not medical advice.

Other regimens for these cancers