Merck conducts clinical trials worldwide to evaluate the safety and effectiveness of our products. These trials are fundamental to the development of innovative medicines and vaccines that treat and prevent illness.

We focus our research on areas where there is the greatest need for significant medical advance. Merck’s pipeline, from preclinical development to phase III clinical trials, illustrates the breadth and depth of our research in areas such as cardiovascular disease, cancer, diabetes, obesity, and Alzheimer’s disease. Merck also devotes significant resources to the prevention of disease through vaccines. In addition, Merck continues to study many of our marketed products for new indications and further evaluate their safety.