in the present study, the effects of intracerebroventricular (icv) administration of normal saline (control), histamine, mepyramine (a histamine h1-receptor antagonist) and ranitidine (a histamine h2-receptor antagonist) were investigated on the formalin-induced pain in rabbits. subcutaneous (sc) injection of a formalin (100 μl, 5%) solution into the ventral surface of the right hind paw was pe...

the present study investigated the effects of intra-dentate gyrus microinjection of naloxone (an opioid antagonist) and thioperamide (an antagonist of histamine h3 receptors) in the formalin test in rats. subcutaneous injection of formalin (50 μl, 2.5 %) in the ventral surface of right hind paw produced a biphasic pattern (first phase: 0-5 min and second phase: 15 - 60 min) of licking/biting an...

Vitamin B12 modulates pain at the local and peripheral levels. This study has investigated the effects of intracerebroventricular (ICV) injection of vitamin B12 on themuscle pain. We used diclofenac (cyclooxygenase inhibitor) and naloxone (opioid receptors antagonist) to clarify the possible mechanisms. For ICV injections, a guide cannula was implanted in the left lateral ...

post operative pain and its control remains one of the most important issues in the field of surgery and health care system. formalin test has been used as a method for assessing pain and analgesia in rats. systemic and spinally administered clonidine, an ?2-adrenergic agonist, is proved to enhance postoperative analgesia. it has also been shown that morphine-dependent rats experience more chro...

in the present study, the effects of intra-hippocampal microinjections of morphine (an opioid agonist) and naloxone (an opioid antagonist) were investigated in the formalin-induced orofacial pain in rats. orofacial pain was induced by subcutaneous injection of formalin (1 %, 50 μl) in the upper lip region and the time spent of face rubbing was measured in 3-min blocks for 45 min. formalin induc...

introduction: previously, we demonstrated that i.p. injection of aqueous extract prepared from aerial parts of drosera spatulata (droseraceae) can induced remarkable analgesia in both phases of formalin test in rats. because, analgesia induced in acute phase of formalin test mainly mediated by activation of central analgesic mechanisms and also paragigantocellularis (pgi) nucleus is part of bra...

Post operative pain and its control remains one of the most important issues in the field of surgery and health care system. Formalin test has been used as a method for assessing pain and analgesia in rats. Systemic and spinally administered clonidine, an ?2-adrenergic agonist, is proved to enhance postoperative analgesia. It has also been shown that morphine-dependent rats experience more chr...

background: studies have emphasized the effect of trigonella foenum-graecum extract on the reduction of pain and inflammation. objective: in this research we investigated the mechanisms of trigonella foenum-graecum extract in reducing pain and inflammation induced by formalin. methods: male albino mice (weight 20 - 25 g) were evaluated through the injection of 2 microliters of formalin to the p...