Are mechanical and cold allodynia in mononeuropathic and arthritic rats relieved by systemic treatment with calcitonin or guanethidine?

S Perrot, N Attal, D Ardid, G Guilbaud - Pain, 1993 - Elsevier
The putative antinociceptive action of guanethidine and calcitonin systemically injected has
been compared in 2 rat models of persistant experimental pain: Freund's adjuvant-induced
arthritis (n= 29) and mononeuropathy induced by 4 loose ligatures around the sciatic nerve
(n= 24). Guanethidine (30 mg/kg, iv) and calcitonin (0.125 mg, sc) were injected once a day
over 1 week, when hyperalgesia was fully developed. The antinociceptive action was
gauged using nociceptive tests based on mechanical or cold stimuli (vocalization threshold …