Opinion granted based on positive results from the Phase 3 KEYNOTE-716 trial

If approved, KEYTRUDA would be the first anti-PD-1 immunotherapy treatment option for patients 12 years and older in the EU across stage IIB, IIC and III melanoma following complete resection

RAHWAY, N.J.--(BUSINESS WIRE)-- Merck (NYSE: MRK), known as MSD outside the United States and Canada, today announced that the European Medicines Agency’s Committee for Medicinal Products for Human Use (CHMP) adopted a positive opinion recommending approval of KEYTRUDA, Merck’s anti-PD-1 therapy, as monotherapy for the adjuvant treatment of adults and adolescents aged 12 years and older with stage IIB or IIC melanoma and who have undergone complete resection. Additionally, the CHMP recommended expanding the indications for KEYTRUDA in advanced (unresectable or metastatic) melanoma and stage III melanoma (as adjuvant treatment following complete resection) to include adolescent patients aged 12 years and older.

“Based on the results of the KEYNOTE-716 trial, KEYTRUDA has shown a significant improvement in recurrence-free survival and distant metastasis-free survival for these patients with resected stage IIB or IIC melanoma,” said Dr. Scot Ebbinghaus, vice president, global clinical development, Merck Research Laboratories. “The CHMP’s positive recommendation brings us one step closer to providing patients 12 years and older in the European Union with a new option for resected stage IIB or IIC melanoma that can reduce the risk of their cancer returning.”

The positive opinion was granted based on results from the Phase 3 KEYNOTE-716 trial, which demonstrated a statistically significant improvement in recurrence-free survival with KEYTRUDA compared to placebo (HR=0.65 [95% CI, 0.46-0.92]; p=0. 0.00658) in patients 12 years and older with stage IIB and IIC melanoma following complete resection. Earlier this year, Merck reported that KEYNOTE-716 also met its key secondary endpoint of distant metastasis-free survival. These results will be featured in a late-breaking oral presentation at the 2022 American Society of Clinical Oncology (ASCO) Annual Meeting on June 5 (Abstract #LBA9500).

The CHMP’s recommendation will now be reviewed by the European Commission for marketing authorization in the European Union, and a final decision is expected in the second or third quarter of 2022.

About Merck’s research in melanoma

Melanoma, the most serious form of skin cancer, is characterized by the uncontrolled growth of pigment-producing cells. The rates of melanoma have been rising over the past few decades, with nearly 325,000 new cases of melanoma diagnosed worldwide in 2020, and melanoma is the leading cause of skin cancer deaths, with more than 57,000 deaths from the disease worldwide in 2020. In Europe, it is estimated there were more than 150,000 new cases of melanoma diagnosed and more than 26,000 deaths from the disease in 2020.

The recurrence rates for resected melanoma are estimated to be 32-46% for patients with stage IIB and IIC disease and 39-74% for patients with stage III disease. The five-year survival rates are estimated to be 87% for stage IIB, 82% for stage IIC, 93% for stage IIIA, 83% for stage IIIB, 69% for stage IIIC and 32% for stage IIID.

Merck is committed to delivering meaningful advances for patients with melanoma with KEYTRUDA and to continuing research in skin cancers through a broad clinical development program across investigational and approved medicines. KEYTRUDA has been established as an important treatment option for the adjuvant treatment of adult patients with resected stage III melanoma and is approved in over 90 countries based on the results from EORTC1325/KEYNOTE-054. KEYTRUDA is also approved worldwide for the treatment of patients with unresectable or metastatic melanoma.

About Merck’s early-stage cancer clinical program

Finding cancer at an earlier stage may give patients a greater chance of long-term survival. Many cancers are considered most treatable and potentially curable in their earliest stage of disease. Building on the strong understanding of the role of KEYTRUDA in later-stage cancers, Merck is studying KEYTRUDA in earlier disease states, with approximately 20 ongoing registrational studies across multiple types of cancer.

About KEYTRUDA® (pembrolizumab) injection, 100 mg

KEYTRUDA is an anti-programmed death receptor-1 (PD-1) therapy that works by increasing the ability of the body’s immune system to help detect and fight tumor cells. KEYTRUDA is a humanized monoclonal antibody that blocks the interaction between PD-1 and its ligands, PD-L1 and PD-L2, thereby activating T lymphocytes which may affect both tumor cells and healthy cells.

Merck has the industry’s largest immuno-oncology clinical research program. There are currently more than 1,700 trials studying KEYTRUDA across a wide variety of cancers and treatment settings. The KEYTRUDA clinical program seeks to understand the role of KEYTRUDA across cancers and the factors that may predict a patient's likelihood of benefitting from treatment with KEYTRUDA, including exploring several different biomarkers.

Selected KEYTRUDA® (pembrolizumab) Indications in the U.S.

Melanoma

KEYTRUDA is indicated for the treatment of patients with unresectable or metastatic melanoma.

KEYTRUDA is indicated for the adjuvant treatment of adult and pediatric (12 years and older) patients with stage IIB, IIC, or III melanoma following complete resection.

See additional selected KEYTRUDA indications in the U.S. after the Selected Important Safety Information.

Selected Important Safety Information for KEYTRUDA

Severe and Fatal Immune-Mediated Adverse Reactions

KEYTRUDA is a monoclonal antibody that belongs to a class of drugs that bind to either the PD-1 or the PD-L1, blocking the PD-1/PD-L1 pathway, thereby removing inhibition of the immune response, potentially breaking peripheral tolerance and inducing immune-mediated adverse reactions. Immune-mediated adverse reactions, which may be severe or fatal, can occur in any organ system or tissue, can affect more than one body system simultaneously, and can occur at any time after starting treatment or after discontinuation of treatment. Important immune-mediated adverse reactions listed here may not include all possible severe and fatal immune-mediated adverse reactions.

Monitor patients closely for symptoms and signs that may be clinical manifestations of underlying immune-mediated adverse reactions. Early identification and management are essential to ensure safe use of anti–PD-1/PD-L1 treatments. Evaluate liver enzymes, creatinine, and thyroid function at baseline and periodically during treatment. For patients with TNBC treated with KEYTRUDA in the neoadjuvant setting, monitor blood cortisol at baseline, prior to surgery, and as clinically indicated. In cases of suspected immune-mediated adverse reactions, initiate appropriate workup to exclude alternative etiologies, including infection. Institute medical management promptly, including specialty consultation as appropriate.

Withhold or permanently discontinue KEYTRUDA depending on severity of the immune-mediated adverse reaction. In general, if KEYTRUDA requires interruption or discontinuation, administer systemic corticosteroid therapy (1 to 2 mg/kg/day prednisone or equivalent) until improvement to Grade 1 or less. Upon improvement to Grade 1 or less, initiate corticosteroid taper and continue to taper over at least 1 month. Consider administration of other systemic immunosuppressants in patients whose adverse reactions are not controlled with corticosteroid therapy.

Immune-Mediated Pneumonitis

KEYTRUDA can cause immune-mediated pneumonitis. The incidence is higher in patients who have received prior thoracic radiation. Immune-mediated pneumonitis occurred in 3.4% (94/2799) of patients receiving KEYTRUDA, including fatal (0.1%), Grade 4 (0.3%), Grade 3 (0.9%), and Grade 2 (1.3%) reactions. Systemic corticosteroids were required in 67% (63/94) of patients. Pneumonitis led to permanent discontinuation of KEYTRUDA in 1.3% (36) and withholding in 0.9% (26) of patients. All patients who were withheld reinitiated KEYTRUDA after symptom improvement; of these, 23% had recurrence. Pneumonitis resolved in 59% of the 94 patients.

Pneumonitis occurred in 8% (31/389) of adult patients with cHL receiving KEYTRUDA as a single agent, including Grades 3-4 in 2.3% of patients. Patients received high-dose corticosteroids for a median duration of 10 days (range: 2 days to 53 months). Pneumonitis rates were similar in patients with and without prior thoracic radiation. Pneumonitis led to discontinuation of KEYTRUDA in 5.4% (21) of patients. Of the patients who developed pneumonitis, 42% interrupted KEYTRUDA, 68% discontinued KEYTRUDA, and 77% had resolution.

Immune-Mediated Colitis

KEYTRUDA can cause immune-mediated colitis, which may present with diarrhea. Cytomegalovirus infection/reactivation has been reported in patients with corticosteroid-refractory immune-mediated colitis. In cases of corticosteroid-refractory colitis, consider repeating infectious workup to exclude alternative etiologies. Immune-mediated colitis occurred in 1.7% (48/2799) of patients receiving KEYTRUDA, including Grade 4 (