Disease Areas

As a human health care (hhc) company, we don’t base R&D decisions on the size of a potential market. Instead, we focus on areas of unmet medical need in neurology and oncology.

Neurology and Oncology Research Presents Formidable Challenges

In fact, those challenges may be too daunting for some pharmaceutical companies. They may shy away from research into dementia. They may shun difficult cancers that don’t show a clear path to success. Solutions to such diseases may seem too hard to find. Too problematic to pursue. These are the kinds of challenges hhc was made for.

Learn how we’re spearheading work in oncology, dementia and Alzheimer’s disease treatments, sleep-wake disorders and more.

A purple brain illustrating how Eisai is committed to tackling hard-to-treat neurological conditions

Advancing Treatment for Complex Neurological Conditions

We’re tackling some of the hardest to treat conditions including Alzheimer’s disease and other forms of dementia, insomnia, narcolepsy, hypersomnia and more.

Learn more about our work in neurology
An Eisai scientist working at a computer in a lab coat, gloves, and a mask

Working Towards a World Without Cancer

Eisai scientists are working to advance cancer therapeutics to benefit more patients and address more cancers, and we won’t stop pursuing breakthroughs until the world is cancer-free.

Learn more about our work in oncology