Improving Health Improving Lives

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

Today, Merck has more than 50 prescription products in various therapeutic areas, such as cardiovascular disease, respiratory disease, oncology, neuroscience, infectious diseases, immunology and women's health.

Visit Our Product List A - Z

Need Help Paying for
Your Medicine or Vaccines?

At Merck, we believe that no one should go without the medicines or vaccines they need. Merck was among the first American pharmaceutical companies to offer assistance to those unable to afford their medications, through its patient assistance program started over 55 years ago.

Today, our MerckHelps program provides certain medicines and adult vaccines, for free, to eligible, underserved individuals across the nation.

Reimbursement support and patient assistance programs

For Health care professionals

Access tools and materials for patient support, product sample requests, up-to-date professional resources, and other Merck professional sites.

Health Care Professionals Website

Report Adverse Experience

To report an adverse experience with a specific Merck product, please call the Merck National Service Center at 800-444-2080.

The Science of
Healthier Animals

Merck Animal Health is a global leader in the research, development, manufacturing and sale of veterinary medicines, offering one of the widest range of veterinary pharmaceuticals, vaccines and health management solutions and services.

Learn More