Positive opinion granted for KEYTRUDA plus chemotherapy for the first-line treatment of adult patients with primary advanced or recurrent endometrial carcinoma who are candidates for systemic therapy, based on the Phase 3 NRG-GY018 trial, also known as KEYNOTE-868

Positive opinion also granted for KEYTRUDA plus chemoradiotherapy for the treatment of FIGO 2014 Stage III-IVA locally advanced cervical cancer in adults who have not received prior definitive therapy, based on the Phase 3 KEYNOTE-A18 trial

RAHWAY, N.J.--(BUSINESS WIRE)-- Merck (NYSE: MRK), known as MSD outside of the United States and Canada, today announced that the European Medicines Agency’s Committee for Medicinal Products for Human Use (CHMP) adopted positive opinions recommending approval of KEYTRUDA® (pembrolizumab), Merck’s anti-PD-1 therapy, for two indications in gynecologic cancers. The first opinion recommends the approval of KEYTRUDA in combination with carboplatin and paclitaxel, followed by KEYTRUDA as a single agent, for the first-line treatment of adult patients with primary advanced or recurrent endometrial carcinoma who are candidates for systemic therapy. The second positive opinion recommends the approval of KEYTRUDA in combination with chemoradiotherapy (CRT) for the treatment of FIGO (International Federation of Gynecology and Obstetrics) 2014 Stage III-IVA locally advanced cervical cancer in adults who have not received prior definitive therapy. The CHMP’s recommendations will now be reviewed by the European Commission for marketing authorization in the European Union (EU), and final decisions are expected in the fourth quarter of 2024.

“At Merck, we are deeply committed to expanding the role of KEYTRUDA to improve outcomes for more patients facing difficult-to-treat gynecologic cancers as we work to address the impact of women’s cancers around the world,” said Dr. Gursel Aktan, vice president, global clinical development, Merck Research Laboratories. “These positive CHMP opinions bring us one step closer to providing new immunotherapy-based regimens to more patients with endometrial and cervical cancer in the European Union who may benefit. We look forward to the European Commission’s decisions.”

The recommendation in primary advanced or recurrent endometrial carcinoma is based on the NRG-GY018 trial, also known as KEYNOTE-868, evaluating KEYTRUDA in combination with carboplatin and paclitaxel, followed by KEYTRUDA as a single agent. In this study, the KEYTRUDA-based regimen demonstrated a statistically significant and clinically meaningful improvement in progression-free survival (PFS) versus placebo plus carboplatin and paclitaxel. If approved, this would mark the third indication for KEYTRUDA in endometrial cancer in Europe. KEYTRUDA plus LENVIMA® (lenvatinib) was approved in November 2021 for the treatment of advanced or recurrent endometrial carcinoma in adults who have disease progression on or following prior treatment with a platinum‑containing therapy in any setting and who are not candidates for curative surgery or radiation, and KEYTRUDA monotherapy was approved in April 2022 for these patients who have microsatellite instability-high (MSI-H) or deficient mismatch repair (dMMR) tumors. In June 2024, KEYTRUDA in combination with carboplatin and paclitaxel, followed by KEYTRUDA as a single agent, was approved in the U.S. for the treatment of adult patients with primary advanced or recurrent endometrial carcinoma.

The recommendation in newly diagnosed patients with FIGO 2014 Stage III-IVA locally advanced cervical cancer is based on the KEYNOTE-A18 trial, also known as ENGOT-cx11/GOG-3047, in which KEYTRUDA in combination with concurrent CRT demonstrated statistically significant and clinically meaningful improvements in overall survival (OS) and PFS versus CRT alone. If approved, this would mark the second indication for KEYTRUDA in cervical cancer in Europe. KEYTRUDA plus chemotherapy, with or without bevacizumab, was approved in April 2022 for the treatment of persistent, recurrent or metastatic cervical cancer in adults whose tumors express PD-L1 (Combined Positive Score [CPS] ≥1). In January 2024, KEYTRUDA in combination with CRT was approved in the U.S. for the treatment of patients with FIGO 2014 Stage III-IVA cervical cancer.

About endometrial carcinoma

Endometrial carcinoma begins in the inner lining of the uterus, which is known as the endometrium, and is the most common type of cancer in the uterus. Globally, endometrial cancer is the sixth most common cancer in women and 15th most common cancer overall. Worldwide, it is estimated there were approximately 420,368 patients diagnosed with endometrial cancer and 97,723 patient deaths from the disease in 2022. In Europe, it is estimated there were approximately 124,874 patients diagnosed with endometrial cancer and 30,272 patient deaths from the disease in 2022.

About cervical cancer

Cervical cancer forms in the cells lining the cervix, which is the lower part of the uterus. All women are at risk for cervical cancer, and it is most frequently diagnosed between the ages of 35 and 44. While screenings and prevention have resulted in declining cervical cancer rates, the disease continues to affect many people in the U.S. and around the world. Cervical cancer is the fourth most common cancer in women globally. Worldwide, it is estimated there were approximately 662,301 patients diagnosed with cervical cancer and 348,874 patient deaths from the disease in 2022. In Europe, it is estimated there were approximately 58,219 new cases of cervical cancer diagnosed and 26,950 patient deaths from the disease in 2022.

About Merck’s research in women’s cancers

Merck is advancing research aimed at expanding treatment options for certain breast and gynecologic (ovarian, cervical and endometrial) cancers, with a goal of improving outcomes for more patients affected by these diseases. Breast cancer and gynecological cancers are the first and second most commonly occurring cancer types among women worldwide, respectively, and Merck aims to give patients facing these devastating diseases options. With more than 20 clinical trials in more than 18,000 patients around the world, Merck is driving innovative research to purposefully advance standards of care in women’s cancers. Merck’s research efforts include trials focused on evaluating its medicines in earlier stages, as well as identifying novel mechanisms and new combinations with these treatments. Merck is working to develop a portfolio and pipeline to address the impact of women’s cancers on patients, their families and communities globally.

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 1,600 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.

Cervical Cancer

KEYTRUDA, in combination with chemoradiotherapy (CRT), is indicated for the treatment of patients with FIGO 2014 Stage III-IVA cervical cancer.

KEYTRUDA, in combination with chemotherapy, with or without bevacizumab, is indicated for the treatment of patients with persistent, recurrent, or metastatic cervical cancer whose tumors express PD-L1 (CPS ≥1) as determined by an FDA-approved test.

KEYTRUDA, as a single agent, is indicated for the treatment of patients with recurrent or metastatic cervical cancer with disease progression on or after chemotherapy whose tumors express PD-L1 (CPS ≥1) as determined by an FDA-approved test.

Endometrial Carcinoma

KEYTRUDA, in combination with carboplatin and paclitaxel, followed by KEYTRUDA as a single agent, is indicated for the treatment of adult patients with primary advanced or recurrent endometrial carcinoma.

KEYTRUDA, in combination with lenvatinib, is indicated for the treatment of adult patients with advanced endometrial carcinoma that is mismatch repair proficient (pMMR) as determined by an FDA-approved test or not MSI-H, who have disease progression following prior systemic therapy in any setting are not candidates for curative surgery or radiation.

KEYTRUDA, as a single agent, is indicated for the treatment of adult patients with advanced endometrial carcinoma that is MSI-H or dMMR, as determined by an FDA-approved test, who have disease progression following prior systemic therapy in any setting and are not candidates for curative surgery or radiation.

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 programmed death receptor-1 (PD-1) or the programmed death ligand 1 (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.

Pneumonitis occurred in 7% (41/580) of adult patients with resected NSCLC who received KEYTRUDA as a single agent for adjuvant treatment of NSCLC, including fatal (0.2%), Grade 4 (0.3%), and Grade 3 (1%) adverse reactions. Patients received high-dose corticosteroids for a median duration of 10 days (range: 1 day to 2.3 months). Pneumonitis led to discontinuation of KEYTRUDA in 26 (4.5%) of patients. Of the patients who developed pneumonitis, 54% interrupted KEYTRUDA, 63% discontinued KEYTRUDA, and 71% 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 (

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