Hogan & Hartson is being sued for malpractice by a client who alleges the firm used attorney-client information to boost a competitor.

In the complaint, filed in Washington, D.C., Superior Court last month, Prestige Brands Inc., makers of household products like Comet and Compound W, claims lawyers at Hogan & Hartson breached their retainer agreement and committed legal malpractice by helping another company get a competing product on the market.