The C and B5, have a massive effect on cortisol, hence why Serpa notes it makes you tired. I did this before with an Endo for cortisol testing, and the first thing he said was no vitamin C two weeks before the test.

Melatonin turns off cortisol production at night, but it isnt a constant effect, so maybe a couple of days off and Seriphos, I personally think you need to be off for a while.

But as both and I Sherpa mentioned, you need to avoid withdrawals, so come off everything gently.