Skip to main content
. Author manuscript; available in PMC: 2013 Jun 1.
Published in final edited form as: Pain. 2012 Apr 13;153(6):1232–1243. doi: 10.1016/j.pain.2012.02.035

Figure 7. Post-stimulus VAS ratings: Opioid-induced hyperalgesia by remifentanil compared to naloxone and control conditions (N=8).

Figure 7

Post-stimulus VAS ratings to 45°C showed only a trend for increased sensitivity over time across the naloxone, remifentanil and control conditions (A). Post-stimulus VAS ratings to 49°C stimuli revealed significantly increased sensitivity over time for all conditions with a trend for opioid-induced hyperalgesia following remifentanil compared to the control condition (B). Mean ± SEM; VAS, visual analogue scale.