UHN/MSH Medical Consult Service
Pharmacology
Steroid
Equivalent
dose (mg)
Relative
potency
t1/2 (hrs)
Dexamethasone (Decadron)
0.5
40 x
36-54
Methylprednisolone (Solumedrol)
4
5 x
18-36
Prednisone
5
4 x
18-36
Hydrocortisone (Solucortef)
20
1 x
8-12
Opioid
Equivalent
dose
Relative
potency
Duration
of action
Codeine
100 mg po q4h
0.1 x
4-6 hrs
Fentanyl patch
25 mcg/hr
0.25 x
72 hrs
Morphine
10 mg po q4h
1 x
4-5 hrs
Oxycodone
5 mg po q4h
2 x
3-6 hrs
Hydromorphone
2 mg po q4h
5 x
> 5 hrs
Rule of thumb:  to convert po dose to sc/IV dose, divide by 2

Breakthrough dose: given q1h as either 10% of total daily dose or 1/2 of q4h dose.
OPIOID DOSE EQUVALENCE
STEROID DOSE EQUIVALENCE
WARFARIN