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Data updated: Mar 10, 2026

KEYTRUDA

PEMBROLIZUMAB Programmed Death Receptor-1-directed Antibody Interactions
Oncology Approved 2014-09-04

Keytruda (pembrolizumab) is a programmed death receptor-1 (PD-1)-blocking antibody indicated for the treatment of several types of cancer, including melanoma, non-small cell lung cancer (NSCLC), and malignant pleural mesothelioma. It is utilized in various clinical settings, ranging from first-line treatment for metastatic disease to neoadjuvant and adjuvant therapy for resectable tumors. The drug is approved for use as a single agent or in combination with chemotherapy, depending on the specific cancer type, stage, and the presence of biomarkers such as PD-L1.

Source: FDA Label • Merck • Programmed Death Receptor-1 Blocking Antibody

How KEYTRUDA Works

Pembrolizumab is a monoclonal antibody that binds to the PD-1 receptor on T cells, blocking its interaction with the ligands PD-L1 and PD-L2. Normally, when these ligands bind to the PD-1 receptor, they inhibit T cell proliferation and cytokine production, a mechanism that some tumors use to evade the immune system. By blocking this pathway, pembrolizumab removes the inhibition of the immune response, allowing for an enhanced anti-tumor immune response.

Source: FDA Label
79
Indications
--
Phase 3 Trials
49
Priority Reviews
11
Years on Market

Details

Status
Prescription
First Approved
2014-09-04
Routes
INTRAVENOUS
Dosage Forms
SOLUTION

Companies

Active Ingredient: PEMBROLIZUMAB

KEYTRUDA Approval History

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What KEYTRUDA Treats

16 indications

KEYTRUDA is approved for 16 conditions since its original approval in 2014. These indications span multiple therapeutic areas including oncology, immunology, and more.

  • Melanoma
  • Non-Small Cell Lung Cancer
  • Head and Neck Cancer
  • Classical Hodgkin Lymphoma
  • Urothelial Carcinoma
  • Gastric Cancer
  • Esophageal Cancer
  • Cervical Cancer
Source: FDA Label

KEYTRUDA Target & Pathway

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Target

PD-1 (Programmed Cell Death Protein 1) Immune Checkpoint

An immune checkpoint receptor on T-cells that acts as an 'off switch' for immune responses. Cancer cells often exploit PD-1 by expressing its ligands (PD-L1/PD-L2), allowing tumors to evade immune detection. Blocking PD-1 releases this brake, enabling T-cells to recognize and attack cancer cells.

Pathway Context

PD-1 on T-cells binds to PD-L1/PD-L2 on tumor cells, suppressing immune attack

PD-L1 (Programmed Death-Ligand 1) ligand

A protein expressed on tumor cells and immune cells that binds to PD-1 on T-cells, suppressing immune responses. Many cancers overexpress PD-L1 to avoid immune attack. Blocking PD-L1 prevents this immune suppression, allowing the body's T-cells to fight cancer.

PD-L2 (Programmed Death-Ligand 2) ligand

A second ligand for PD-1, expressed on antigen-presenting cells and some tumors. PD-L2 binds PD-1 with higher affinity than PD-L1 but is less widely expressed. Drugs blocking PD-1 prevent both PD-L1 and PD-L2 interactions.

KEYTRUDA Competitors

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10 other drugs also target PD-1. Compare mechanisms, indications, and trial activity.

View all 10 PD-1 drugs →
Drug = Competitor name Company = Manufacturer N indic. = FDA-approved indications → Date = Patent/exclusivity expiry

Competitors share the same molecular target (PD-1). Earlier expiry dates signal biosimilar/generic opportunities.

Drugs Similar to KEYTRUDA

FDA-approved drugs for similar conditions. Compare mechanisms and indications to understand treatment alternatives.

OPDIVO
NIVOLUMAB
10 shared
Bristol-Myers Squibb
Shared indications:
MelanomaNon-Small Cell Lung CancerRenal Cell Carcinoma +7 more
CYRAMZA
RAMUCIRUMAB
4 shared
Eli Lilly
Shared indications:
Gastric CancerNon-Small Cell Lung CancerColorectal Cancer +1 more
AVZIVI
BEVACIZUMAB-TNJN
3 shared
BIO-THERA SOLUTIONS LTD
Shared indications:
Non-Small Cell Lung CancerRenal Cell CarcinomaCervical Cancer
CAPECITABINE
CAPECITABINE
3 shared
TEYRO LABS
Shared indications:
Colorectal CancerGastric CancerEsophageal Cancer
MVASI
BEVACIZUMAB-AWWB
3 shared
Amgen
Shared indications:
Non-Small Cell Lung CancerRenal Cell CarcinomaCervical Cancer
OPDIVO QVANTIG
NIVOLUMAB
3 shared
Bristol-Myers Squibb
Shared indications:
Renal Cell CarcinomaMelanomaNon-Small Cell Lung Cancer
ZIRABEV
BEVACIZUMAB-BVZR
3 shared
Pfizer
Shared indications:
Non-Small Cell Lung CancerRenal Cell CarcinomaCervical Cancer
ALYMSYS
BEVACIZUMAB-MALY
2 shared
AMNEAL PHARMS LLC
Shared indications:
Non-Small Cell Lung CancerCervical Cancer
ERBITUX
CETUXIMAB
2 shared
IMCLONE
Shared indications:
Head and Neck CancerColorectal Cancer
IMFINZI
DURVALUMAB
2 shared
AstraZeneca
Shared indications:
Non-Small Cell Lung CancerBiliary Tract Cancer
IMJUDO
TREMELIMUMAB-ACTL
2 shared
AstraZeneca
Shared indications:
Hepatocellular CarcinomaNon-Small Cell Lung Cancer
JOBEVNE
BEVACIZUMAB-NWGD
2 shared
BIOCON BIOLOGICS INC
Shared indications:
Non-Small Cell Lung CancerCervical Cancer
KEYTRUDA QLEX
PEMBROLIZUMAB
2 shared
Merck
Shared indications:
MelanomaNon-Small Cell Lung Cancer
MEKINIST
TRAMETINIB DIMETHYL SULFOXIDE
2 shared
Novartis
Shared indications:
MelanomaNon-Small Cell Lung Cancer
MEKTOVI
BINIMETINIB
2 shared
ARRAY BIOPHARMA INC
Shared indications:
MelanomaNon-Small Cell Lung Cancer
PHOTOFRIN
PORFIMER SODIUM
2 shared
AXCAN SCANDIPHARM
Shared indications:
Esophageal CancerNon-Small Cell Lung Cancer
PROLEUKIN
ALDESLEUKIN
2 shared
CHIRON
Shared indications:
Renal Cell CarcinomaMelanoma
SORAFENIB TOSYLATE
SORAFENIB TOSYLATE
2 shared
Viatris
Shared indications:
Hepatocellular CarcinomaRenal Cell Carcinoma
TAFINLAR
DABRAFENIB MESYLATE
2 shared
Novartis
Shared indications:
MelanomaNon-Small Cell Lung Cancer
TEVIMBRA
TISLELIZUMAB-JSGR
2 shared
BEIGENE
Shared indications:
Esophageal CancerGastric Cancer
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Active Pipeline

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Ongoing clinical trials by development phase

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Key Completed Trials

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Completed studies with published results, ranked by significance

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Trial Timeline

Full development history with FDA approval milestones

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Understanding FDA Approval Types
Count Type What it means
- ORIG Original approval - drug first enters market
- SUPPL - Efficacy New indication (new disease/condition approved)
- SUPPL - Labeling Label text changes (warnings, dosing updates)
- SUPPL - Manufacturing Production changes (new facility)
- SUPPL - Chemistry Formulation changes (new dosage strength)

Green lines in the timeline show ORIG and Efficacy approvals - the clinically meaningful milestones.

KEYTRUDA FDA Label Details

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Indications & Usage

FDA Label (PDF)

KEYTRUDA is a programmed death receptor-1 (PD-1)-blocking antibody indicated: Melanoma for the treatment of patients with unresectable or metastatic melanoma. for the adjuvant treatment of adult and pediatric (12 years and older) patients with Stage IIB, IIC, or III melanoma following complete resection. Non-Small Cell Lung Cancer (NSCLC) in combination with pemetrexed and platinum chemotherapy, as first-line treatment of patients with metastatic nonsquamous NSCLC, with no EGFR or ALK genomic tumor aberrations. in combination with carboplatin and either paclitaxel or paclitaxel protein-bound, ...

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Data Sources

Data sourced from official FDA and NIH databases. Click links to verify on original sources.