Norbrook is a United Kingdom-based pharmaceutical company. It was founded in 1969 by Lord Ballyedmond as Norbrook Laboratories Ltd in Northern Ireland. In 1970, Norbrook began manufacturing of veterinary pharmaceuticals. In 2011 the Norbrook Group was listed by the Belfast Telegraph in its Top 100 Companies list as being in position 28
Norbrook manufactures several pharmaceutical drugs, the most well-known of which are the antibiotic drugs Noroclav and Betamox, NSAIDs such as Carprieve, Loxicom and Flunixin.
Norbrook is the only company in the world which is licenced by the United States Food and Drugs Administration to manufacture sterile injections for veterinary use outside the USA and import them for sale in USA territory.