My daughter is on different doses of the 5mg tab but here is what we do:

2.5 mg 6AM (right when gets up)

1.75 mg noon

2.5 mg 8PM (bedtime)

Her endo & i feel that the most stressfull time for her is when she is waking up. i do not wake her in the early hours (anymore) because the steroids sumtime "stimulate" her and she cant get back to sleep.