Read about our response to COVID-19

Our Business

We are inspired by a shared vision and mission to save and improve lives.



With a steady focus on innovation and sound science, we work to deliver vaccines, medicines, and animal health products that can help millions around the world.

Our core product categories include diabetes, cancer, vaccines and hospital acute care.

We continue to focus our research on conditions that represent some of today’s most significant health challenges—like cancer, HIV, HPV, hepatitis C, cardio-metabolic disease, antibiotic-resistant infection and Alzheimer’s disease, and we are on the front lines in the fight against emerging global pandemics, such as Ebola.

We also devote extensive time and energy to increasing access to medicines and vaccines through far-reaching programs that donate and deliver our products to the people who need them.

We’re applying our global reach, financial strength and scientific excellence to doing more of what we’re passionate about: improving health and improving lives.


We are a global health care company that delivers innovative health solutions through our prescription medicines, vaccines, biologic therapies and animal health products. View the list of products marketed in the United States.

Prescription products
Our core business is the discovery and development of prescription medicines for diseases and conditions that impact millions of people.

We invest billions of research dollars to find medicines that can help improve lives. Today, our company has more than 50 prescription products in key therapeutic areas such as cardiovascular disease, respiratory disease, oncology, neuroscience, infectious disease, immunology and women’s health.

Vaccines are one of the greatest public health success stories in history, and our company has played its part in that story.

We have been working to discover and develop vaccines for more than a century. Our unique vaccines have helped prevent a number of diseases, including some never thought to be preventable. Today, we remain dedicated to the complex business of researching and producing vaccines.

Animal Health
Our Animal Health business is a global leader in the research, development, manufacturing and sale of veterinary medicines. Our Animal Health business offers a broad choice of vaccines, anti-infective and antiparasitic drugs, a complete range of fertility management products, pharmaceutical specialty products, innovative delivery solutions, performance technologies and value-added programs, such as pet recovery services and livestock data management tools.

Our pipeline provides an overview of our late-stage clinical development programs and is updated quarterly. View the pipeline.

Senior leadership

Our chairman and CEO, Ken Frazier, is accountable to our company’s Board of Directors.

Learn more about our Board members, including committee charters and assignments.

Our Executive Committee manages the business. These top leaders, representing diverse areas of the company, meet regularly to review progress against our company goals. View the list of Executive Committee members.


The company, Merck & Co., Inc., Kenilworth, N.J., U.S.A., is known as MSD outside the United States and Canada and is listed on the New York Stock Exchange under the symbol “MRK.”

Visit our corporate website.