The supraspinal analgesic action of pregabalin was observed only after peripheral nerve injury, and pregabalin (i.p. and i.c.v).
Finally, although several hypotheses have been advanced, the mechanism of the analgesic action of acetaminophen (paracetamol) in different pain conditions is far from clear.
However, the analgesic action of drugs was too short to achieve pain relief, which allow undisturbed sleep during the first postoperative nights.
To explore the site and mechanism of the analgesic action of melatonin, the present study was designed to evaluate the analgesic effects of intraperitoneal (i.p).
Furthermore, suitable neurostimulatory or neuroinhibitive methods involving the central nervous system are being sought that can amplify the analgesic action of opioids.
Their analgesic action was then assayed in vivo in the acetic acid writhing test and the occurrence of peripheral and central cholinergic side effects was also determined.
The aim of this study is to observe the effect of menthol on the percutaneous penetration and skin analgesic action of tetracaine gel (T-gel).
The mechanism by which gabapentin exerts its analgesic action is unknown, but in animal models of analgesia, gabapentin prevents allodynia (pain related behavior in response to a normally innocuous stimulus) and hyperalgesia (exaggerated response to painful stimuli).
Its positive effects in the symptomatic treatment of headache are attributed to an increased analgesic action of other drugs [14], a central cholinergic analgesic effect [15], its ability to abolish hyperalgesia [6] and a vasoconstrictive activity [16].
Pugh et al. used a similar infusion rate as in the present study in patients after abdominal surgery with adequate analgesic action and very comparable plasma-levels (37 145 μg/L) [25].
The characteristics of this model of neuronal hyperexcitability were investigated in this study, particularly with respect to the activity of antiepileptic drugs and compounds representing novel mechanisms of analgesic action.
