“Addressing and solving the most important unmet medical needs of our time.”

About Us / History

About Us


Dr. Paul Janssen

Ortho Products began operations in Montreal in 1941 with one product and three employees. Moving to Toronto in 1944, the company outgrew a number of rented facilities until its own facilities were constructed in 1955. Continued growth required a number of plant expansions.

McNeil products were first offered in Canada in 1948 through a distributor. Approximately ten years later, Johnson & Johnson acquired McNeil Laboratories and rapid growth began. In 1991, McNeil merged with Ortho to form Ortho-McNeil Inc.

In 1953, Dr. Paul Janssen established Janssen Pharmaceutica, N.V., a pharmaceutical research laboratory based in Beerse, Belgium. This company became part of Johnson & Johnson in 1961.

Initially, McNeil Pharmaceutical and Ortho Pharmaceutical distributed Janssen products, until the company was established in Canada in 1982. Growth in new products, staff and sales were rapid for Janssen Pharmaceutica Canada and in 1995 merged with Ortho-McNeil to form Janssen-Ortho Inc. which was later renamed Janssen Inc.

Today, the Janssen Pharmaceutical Companies have thousands of committed employees in hundreds of innovative companies located in more than 50 countries around the world. Janssen is actively developing treatments for patients in six important areas of healthcare:

  • Oncology
  • Immunology
  • Neuroscience
  • Infectious diseases and vaccines
  • Metabolic and chronic diseases
  • Women’s Health

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