I did find this reference (which at least would lead me to believe they would need to wait to do the testing. On the other hand, the high cortisol level is peculiar if you’re missing enzymes to produce that much. Could some prednisone still be in her system??

Sharon

Additional Information

Tapering of corticosteroids after a short course of therapy (<7-10 days) is generally not required unless the disease/inflammatory process is slow to respond. Tapering after prolonged exposure is dependent upon the individual patient, duration of corticosteroid treatments, and size of steroid dose. Recovery of the HPA axis may require several months. Subtle but important HPA axis suppression may be present for as long as several months after a course of as few as 10-14 days duration. Testing of HPA axis (cosyntropin) may be required, and signs/symptoms of adrenal insufficiency should be monitored in patients with a history of use.

http://www.metagenics.com/ADAM/41/105700.html