Archives Internationales De Pharmacodynamie Et De Thérapie
RU 31158, 6-(orthochlorophenyl)-1, 2-dihydro-2 (N-methylpiperazine-1-yl) methylene-8-nitro-IH, 4H-imidazo [1,2-a] [1,4] benzodiazepin-1-one methanesulphonate, demonstrated potent hypnotic activity compared to diazepam when examined in the mouse and rat. RU 31158 potentiated minimal hypnosis in mice induced by both hexobarbital and chlorprothixene with ED50 values of 2.15 (1.53-3.01) and 0.69 (0.46-1.02) mg/kg p.o. respectively; these compared to values for diazepam of 17.00 (11.25-25.67) and 3.60 (2.25-5.76) mg/kg p.o.
The present study was undertaken to evaluate the effects of single and repeated doses of triazolam (1 mg/kg IP) and desipramine (DMI) (10 mg/kg IP) alone and in combination on certain pharmacologic responses and brain catecholamine levels in rats.
Diazepam, clorazepate and flunitrazepam are used to premedicate , to anesthetize and after the intervention. Anxiolysis , sedation, hypnosis, muscle relaxation, amnesia and seizure prevention justified their employment. They have few side effects. Anesthesiologist just have to be careful of their long-acting effects as for ambulatory anaesthesia.
IDPH-791, when injected (ip) to mice potentiated the pentobarbitone sleeping time in a dose dependent manner. Involvement of neurotransmitters and receptors in this effect was studied using various receptor blockers, enzyme inhibitors, agonist and an amine depletor. Pretreatment with high dose of yohimbine (0.5 mg/kg), haloperidol, cyproheptadine, atropine and a combination of atropine and yohimbine significantly reversed the activity.
Rubus brasiliensis hexanic fraction induced anxiolysis in rodents, which was reversed by flumazenil, a specific GABA(A)-benzodiazepine receptor antagonist (Nogueira et al., 1998a,b). Then, we investigated if this hexanic fraction was able to induce hypnotic, anticonvulsant and muscle relaxant effects, and the involvement of GABA(A)-system. The hexanic fraction (50, 100, 150 and 300 mg/kg, vo) was administered to male Swiss mice, 30 min before the tests.
Gamma-hydroxybutyric acid (GHB)-sensitive (GHB-S) and GHB-resistant (GHB-R) rats have been selectively bred for their opposite sensitivity to the sedative/hypnotic effect of GHB. This opposite sensitivity has been found to generalize to the GABA(B) receptor agonist, baclofen. A control line [named GHB-control (GHB-C)] has been derived from the foundation stock of GHB-S and GHB-R rats. GHB-C rats have been bred without any evaluation of their sensitivity to GHB.
The accurate assessment of the depth of anesthesia, allowing a more accurate adaptation of the doses of hypnotics, is an important end point for the anesthesiologist. It is a particularly crucial issue in pediatric anesthesia, in the context of the recent controversies about the potential neurological consequences of the main anesthetic drugs on the developing brain. The electroencephalogram signal reflects the electrical activity of the neurons in the cerebral cortex. It is thus the key to assessment of the level of hypnosis.
Eighty-six patients with cervicogenic headaches underwent a comprehensive clinical and instrumental studies involving neurological and neuroorthopedic examinations; pain rating by the visual-analogue scale (VAS) and the rank scale, and neuroimaging and electrophysiologic techniques. The patients were divided into two groups: a study group (n = 43) and a control one (n = 43).
OBJECTIVE: To report a case of levator ani syndrome (LAS) that was successfully treated with cyclobenzaprine. CASE SUMMARY: A 26-year-old male presented with a 3-week history of severe, intermittent, aching anorectal pain that would last for 30-60 minutes per episode and occurred between 1 and 3 times per day. The pain was aggravated by squatting, with no alleviating factors. Physical examination revealed no prostate tenderness, lesions, hemorrhoids, or fissures and rectal tone was intact. The patient had moderate posterior rectal tenderness.