“ Formalin injury‐induced nociceptive behaviours were reduced by intrathecal pretreatment with inhibitors of nitric oxide synthase (NG‐nitro‐L‐arginine methyl ester, L‐NAME), arachidonic acid (dexamethasone) or protein kinase C [protein kinase C (19–26) and 1–95‐(isoquinolinesulphonyl)‐2‐methylpiperazine dihydrochloride, H‐7].”