Just got my Synacthen test results back as follows:
0mins 296.4 nmol/L (Greater than 140)
30mins 533.4 nmol/L
60mins 589.6 nmol/L
From what I can gather there should be an increase >200nmol/L from baseline with a 30mins level >550nmol/L for 'normal' adrenal function. However some studies indicate the 60mins level as a better indicator, so I'm not sure which is correct?
Could this be a reason for persistent hypothyroid symptoms despite adequate T4 levels (18.6 pmol/L) on 200mcg Levothyroxine?
Also note latest FT3 level is 5.2 pmol/L (3.9 - 6.8) which continues the downward trend from previous results of 6.38 (Nov 17) and 5.73 (Feb 18).