Outside counsel for United HealthCare Services had been given the authority to enter into a $125 million settlement with the makers of the sleep-disorder drug Provigil, a federal judge has ruled in finding that the accord settling antitrust claims is enforceable.

U.S. District Judge Mitchell Goldberg of the Eastern District of Pennsylvania ruled Wednesday that a 2015 memorandum of understanding between United and three drug companies was binding. The decision rejected efforts by United to back out of the accord over claims that, among other things, the company never gave its outside counsel authority to enter into a binding settlement.