Janssen is one of the largest pharmaceutical companies in the United States. The company markets prescription medications for the treatment of schizophrenia, bipolar mania and autistic disorder. It offers products from the HALDOL, RISPERDAL and INVEGA brands. Janssen has been in business since 1953. The company deals in the development and research of compounds for a range of psychiatric disorders, including psychosis, sleep, anxiety, depression and substance abuse, and attention deficit and hyperactivity. Its facility is spread over an area of more than 270-acres. In addition, Janssen is a division of Ortho-McNeil-Janssen Pharmaceuticals. The company also provides patient assistance and medical education services.
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