Stung by criticism of its plan to charge a whopping $89,000 a year in the U.S. for a muscular dystrophy drug that costs less than $1,500 elsewhere, Marathon Pharmaceuticals on Monday said it was "pausing" that rollout for an unspecified amount of time.

Marathon also said that American patients who now receive that drug, deflazacort, from other sources "will continue to have that option."