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Relative potencies of morphine via various routes

Last reviewed dd mmm yyyy. Last edited dd mmm yyyy

Authoring team

The relative potency of morphine when given by various routes is given below:

Route

Potency relative to oral morphine

oral morphine

1

rectal morphine

1

subcutaneous morphine

2

intravenous morphine

3

subcutaneous diamorphine

3

i.e. 3mg oral morphine is equivalent to 1mg of subcutaneous diamorphine

Check summary of product characteristics before prescribing any drugs mentioned.

Reference:

  1. West Midlands Palliative Care Physicians (2003). Palliative care - guidelines for the use of drugs in symptom control.

 

 


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