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. Author manuscript; available in PMC: 2009 Oct 1.
Published in final edited form as: Eur J Pain. 2008 Jun 24;13(4):380–386. doi: 10.1016/j.ejpain.2008.05.008

Fig. 6.

Fig. 6

(a) In animals rendered tolerant to morphine by twice daily injections of morphine (confirmed by tail-flick test, data not shown) QHEND continued to provide an analgesic effect in the formalin test; general linear model, repeated measures test, P < 0.05, (SPSS); n = 7–8 animals per group. (b) The sum of flinches in phase 2; *P < 0.05 QHEND vs Q0ZHG, t-test.