Welcome to the group.
The ACTH of 20pmol/L (ref 2-10) is double what it should be (so NOT a low reading) and is still rising as the seasonal rise period has just begun. Good that he has been started on pergolide but it is likely that he will need a higher dose than the current 1mg to adequately control the PPID.
We will be able to help more once you have the case history filled out.
Lavinia, Dante, George Too and Peanut
Jan 05, RI
EC Support Team