Greer Laboratories

Getting histamines to calm down and take a break is the main goal of Greer Laboratories. The company develops and manufactures a variety of allergy immunotherapy testing and treatment materials. Greer operates through four business units: Human; Veterinary; Source Materials; and Contract Development. The company's products include allergenic extracts, vials, single and multiple skin testing devices, and safety syringes, as well as source materials used for allergy testing such as dust mites, venoms, dander, molds, insects, and pollen. The company began operations in 1904.