Welcome to Shionogi USA

Shionogi USA, Inc. is a pharmaceutical company focused on the development and commercialization of medicines that address areas of unmet medical need. At present, Shionogi USA is involved in the clinical development of innovative compounds for the treatment of HIV/AIDS, Alzheimer’s Disease, stroke, and cancer.

We are the wholly owned US subsidiary of Shionogi & Co., Ltd., one of Japan’s largest research-driven pharmaceutical companies.