Allergan plc is a multinational pharmaceutical company that produces branded and generic drugs, and performs pharmaceutical research and development. The company is headquartered in Dublin, Ireland and operates in over 100 countries. Allergan's products are used in a variety of medical specialties, including ophthalmology, neurology, dermatology, and urology. The company's most well-known product is Botox, a cosmetic treatment used to reduce wrinkles and treat certain medical conditions. Allergan was acquired by AbbVie in 2020.