We did stim. tests on both of my daughters (9 & 7 years old) a few months ago after my infant son was diagnosed with CAH.  They both tested as unaffected but are most likely carriers based on where there results fell on the nomogram.  I would suggest you make sure to have the test done early in the morning so you will get as accurate as results as possible.  They had a horrible time getting an iv started on my 7 year old and after 6 attempts they finaly sent her to the lab to be drawn before the injection and then again an hour after.  By this time it was after 10:30a.m.  Neither of my daughters had any side effects from the injection and did not even seem to experience the "adreneline surge feeling".  Best wishes.     Lisa