The Justice Department says two subsidiaries of pharmaceutical giant Johnson & Johnson have agreed to pay more than $81 million stemming from allegedly illegal promotion of the epilepsy drug Topamax.

The department says Ortho-McNeil Pharmaceutical LLC will plead guilty to promoting the sale of Topamax for psychiatric uses. Federal drug regulators approved it as an anti-epileptic drug.

The government says Ortho-McNeil-Janssen Pharmaceuticals will pay over $75 million for alleged illegal promotion of Topamax for a variety of psychiatric uses.