The California Attorney General Kamala D. Harris announced that California, along with 34 other states and the District of Columbia, has filed a lawsuit against Indivior, a British pharmaceutical company, and MonoSol, an Indiana film technology company, for antitrust violations.

The complaint, filed in U.S. District Court for the Eastern District of Pennsylvania, alleges that Indivior and MonoSol engaged in a multi-pronged “product-hopping” scheme to block competition to Suboxone, an opioid addiction treatment, ultimately generating almost one billion dollars in undeserved profits. In this kind of scheme, pharmaceutical companies try to maintain profits generated via a monopoly by slightly reformulating their product in a way that blocks generic competitors without offering any significant medical or therapeutic advantages to patients.

“When prescription drug companies unlawfully manipulate the marketplace to maximize profits, they put lives at risk and drive up the cost of healthcare for everyone. Indivior and Monosol flagrantly violated the law, deceiving doctors and patients and shutting down generic competition in order to rake in profits,” said Attorney General Harris. “These companies must be held accountable for this unlawful scheme that cost the public nearly a billion dollars and hampered fair competition in the marketplace.”

Indivior, then known as Reckitt Benckiser, was granted FDA approval in 2002 for Suboxone tablets, along with exclusive rights to sell the drug for seven years based on representations that it was unlikely to recover its investment in the drug. During this time, Indivior generated over a billion dollars in sales of the Suboxone tablets.

When its exclusive rights expired in 2009, the company was faced with potential competition expected to eliminate 80% of its profits from Suboxone tablets within a year. Indivior, with MonoSol’s assistance, thwarted that competition by switching the form of Suboxone from tablet to film. It falsely claimed the tablets presented pediatric safety issues, made unfounded claims to physicians that tablets were dangerous, and raised the price of its tablet while lowering the price of the film. Through these actions, Individior was able to maintain artificially high prices for Suboxone, depriving the state and consumers of the benefits of lower prices that come with competition.

The complaint alleges that the conduct and agreement between Indivior and Monosol constitutes monopolization, conspiracy to monopolize, and illegal restraint of trade in violation of federal antitrust laws as well as of California’s Cartwright Act and Unfair Competition Law. The complaint seeks to require Indivior to pay back any profits that resulted from the illegal conduct – disgorgement – and includes injunctive relief to ensure the conduct is not continued or repeated.

Indivior said in a statement that it would continue to “vigorously defend” its position.