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. Author manuscript; available in PMC: 2011 Dec 1.
Published in final edited form as: Pain. 2010 Dec;151(3):763–770. doi: 10.1016/j.pain.2010.09.009

Figure 4.

Figure 4

Combined deltorphin and morphine inhibition of potassium (K+)-evoked CGRP release is dependent on the concentration of both drugs. (A-B) Neither drug alone significantly altered evoked release compared to vehicle pretreatment at any concentration (open bars). (A) Concentration-response relationships are depicted for a consistent concentration (300 nM) of deltorphin followed by increasing concentrations of morphine and (B) increasing concentrations of deltorphin followed by a consistent concentration (500 nM) of morphine (closed bars). N = 4-8/group.