So there is a new drug for breast cancer therapy called Piqray, which inhibits the PI3Ka gene. In the link to the study below they used that to inhibit the formation of HO.

Since this is an FDA approved drug for one condition and seems to be tolerated well....what's the criteria, or typical time frame for an already approved drug getting the approval for another condition ? I'm sure there is a term I can look up for getting a FDA approved drug fast tracked for another use...?