Chase R&D or Chase's R&D division was a pre-War company.
A research division belonging to Constantine Chase, a United States Army general. Doctor Adrienne Adami stated that they believed a new drug created by the division known as "Psycho" would be helpful to the efforts of the military in Anchorage. The doctor mentioned that early clinical trials showed possible side effects including dementia, psychotic aggression, and addiction but "if the thing works it works."
In the Doe trafficking case logs, 120 units of injectable drugs stamped with the seal "Property of Chase R&D" are mentioned as recovered. They were collected by Maj. Newton from the U.S. Army.
“Doctor Adrienn Adami: An overworked and slightly agitate field doctor with several years of experience under her belt, Adami is busy administering Chems (usually Psycho) to wounded or mentally scarred soldiers at the U.S. Field Headquarters medical tent. Investigation into simulated Holotapes reveals discrepancies between her simulated and real-life persona, as her records implicate General Chase in a scandal of drugging soldiers with Chems researched at Chase's pharmaceutical company.”— Fallout 3 Official Game Guide/Wasteland Census
Chase R&D is mentioned in Fallout 3 and Fallout 4.