Heather Zoumas Lubeski, a spokeswoman for Par Pharmaceuticals, said that the company is "working diligently" to get their new supplier approved. Andrea Fisher of the FDA said that the agency "recognizes this is an important drug, and is working with the drug manufacturers so that the drug may return to the market as quickly as possible, while ensuring safety for patients." Delestrogen and its generic counterpart are not only used for transitioning but also, in modest doses, to regulate hormonal imbalance in menopausal women. (Perrigo did not respond to repeated requests for comment.)