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Incidence of flinching behaviour in rats after formalin injection shown in 5 min bins. In phase I (0-5 min), all the groups showed higher number of flinches than morphine. In phase II, groups receiving L-CCBs alone showed higher flinching behaviour than morphine. Groups, which had received L-CCB + morphine showed lower number of flinches. Values are shown as mean ± S.E.M.
