Your browser version is outdated. We recommend that you update your browser to the latest version.



Columbia County Health System offers inpatient and outpatient pharmaceutical services through our close relationship with Elk Drug. In addition to medication management services, our pharmacists assist with out patient infusion services, long term care medication management, and provide educational opportunities for our staff and patients.  Our relationship with Elk Drug also provides continuity of care in our communities.


Sean Thurston, Pharmacist: Sean Thurston received his Bachelor’s Degree in Chemistry from the University of Puget Sound in 2000 and his Doctorate of Pharmacy (PharmD) from Washington State University College of Pharmacy in 2010.  During pharmacy school Sean was president of the pharmacy student organization, was part of a team that placed 4th a national pharmacy business plan competition, and received the 2010 WSU College of Pharmacy Faculty Award for outstanding achievement.  While attending pharmacy school Sean worked 3 years as a pharmacy intern at Sacred Heart Medical Center in Spokane, WA.  Over those 3 years he was responsible for a variety of pharmacy services in the Neonatal ICU, Pediatric ICU, Pediatric Oncology Center, Cardiac ICU, General ICU, General Surgery Floor, General Cardiac Floor, and Anticoagulation Clinic.  In addition, Sean worked at the Medicine Man Pharmacy in Liberty Lake; a compounding and retail pharmacy.  In May of 2010 Sean and his wife Andee moved to Dayton and Sean began working at Elk Drug and Dayton General Hospital.  Sean serves as the Director of Pharmacy for Dayton General Hospital and is also the owner of Elk Drug, a retail pharmacy located in downtown Dayton.

Kim Zessin, Pharmacist:  Kim Zessin is a 1988 graduate of Washington State University College of Pharmacy.  Kim was born in Walla Walla and lived and attended school in Athena and Milton-Freewater, graduating from McLoughlin High School (MacHi) in Milton-Freewater in 1982.  Kim has practiced retail pharmacy for over 15 years, in Milton-Freewater and Walla Walla, at HiWay Drug, BiMart and Safeway.  She also worked at the Walla Walla VA Medical Center and Family Medical Center.    Kim has spent the last several years as a clinical pharmacist at Providence St Mary Medical Center in Walla Walla where she was active as a preceptor in a robust pharmacy residency program and facilitating pharmacy student rotations.  Kim was also actively involved in the Medication Management Team and was instrumental in implementing the anticoagulant protocols and antimicrobial stewardship program at St Mary.  Kim relocated to Dayton in 2015 and works at Elk Drug with part time duties at Dayton General Hospital.  She is very happy to be back performing retail pharmacy, while still being able to use the broad experience she gained in other settings.