1. Opioid Equianalgesic Tables: Are They All Equally Dangerous?
Philip E. Shaheen, MD, Declan Walsh, MSc, FACP, FRCP (Edin), Wael Lasheen, MD, Mellar P. Davis, MD, FCCP, Ruth L. Lagman, MD, MPH 
Journal of Pain and Symptom Management 
Volume 38, Issue 3, Pages (September 2009)
DOI: /j.jpainsymman
Copyright © 2009 U.S. Cancer Pain Relief Committee Terms and Conditions

2. Fig. 1 Equianalgesic ranges for opioid route conversion.
Journal of Pain and Symptom Management  , DOI: ( /j.jpainsymman )
Copyright © 2009 U.S. Cancer Pain Relief Committee Terms and Conditions

3. Fig. 2
Equianalgesic dose ratio ranges for opioid rotation to morphine.
Journal of Pain and Symptom Management  , DOI: ( /j.jpainsymman )
Copyright © 2009 U.S. Cancer Pain Relief Committee Terms and Conditions