Johnson & Johnson sued Samsung Bioepis for allegedly breaching a contract agreement over its launch of a biosimilar to Stelara, J&J's blockbuster psoriasis treatment. The lawsuit, filed late on Monday in a New Jersey federal court,

Janssen has sued Samsung Bioepis, alleging it violated a settlement agreement by authorizing an unauthorized Stelara® biosimilar, potentially harming market competition.

Samsung Bioepis allegedly entered into an agreement with a third-party health company, allowing it to market its own private label of a Stelara biosimilar.

Johnson & Johnson said on Monday it had filed a lawsuit against Samsung Bioepis for breaching its contract agreement with the drugmaker over the launch of a biosimilar to Stelara, J&J's autoimmune drug.

As biosimilar versions of a big-selling Johnson & Johnson medicine reach the U.S. market, the health care giant accused one manufacturer of striking a