Probably you should read a data, leaked from WADA about US sportsmen and the drugs they used before talking about my credibility.
There is documents, that WADA allowed Serena Williams to take oxycodone and hydromorphone (opioids), prednisone, prednisolone, and methylprednisolone. Her sister Venus Williams was allowed to take prednisone, prednisolone, triamcinolone and formoterol. This is very strong grungs, they should lay in hostpital if they need then for living (owning some of this drugs will cause a 14 years sentence in EU). There is also info about Simone Biles and Elena Delle Donne and they promise more :)