WindRose Health Investors has acquired Ganse Apothecary, according to a news release.

Ganse, based in Lancaster, Pa., is a closed-door, long-term care and specialty pharmacy. Founded in 1971, the pharmacy supports patients suffering from severe and persistent mental illness and intellectual and developmental disabilities.

WindRose, based in New York, pursues control equity investments in healthcare companies. Founded in 2000, the firm invests in a broad range of industry segments, including outsourced services to payors and health systems, technology-enabled services, healthcare providers and value-added distribution.

Terms of the transaction were not disclosed.

WindRose is merging Ganse with Terrapin Pharmacy, an existing portfolio company. Based in Annapolis, Md., Terrapin is a specialized pharmacy primarily serving individuals diagnosed with severe and persistent mental illnesses in the Mid-Atlantic region.