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Showing 2 results for Dextromethorphan
Noushin Mousavi Buiki, Hossein Mahmoudzadeh, Ali Movafegh,
Volume 12, Issue 2 (7-2008)
Abstract
Background: Considering undesirable postoperative pain in recovery phase and many side effects of narcotics, the preemptive analgesic effect of oral dextromethorphane on cholecystectomized patients was studied in this study. Material and Methods: In this double blind, randomized, clinical trial on 44 patients in Shari’ati Hospital, Tehran University of Medical Sciences, 22 patients received placebo and 22 received 45 mg oral dextromethorphane 2 hours pre-operation. The anesthesia method was the same in both groups. Visual analog scale (VAS) for pain was recorded for each group in 1, 6 and 24 hours. Used morphine amount was recorded. As dextromethorphane causes drowsiness the patient's alertness was also recorded with Ramsey scores post- operation. Data were analyzed using t-test, Chi-square, and Mann-Whitney-U-tests. Results: Mean postoperative pain intensity was 9.55 in case and 8.33 in control group respectively. This was statistically significant but limited only in the first postoperative hour. No difference was observed in 6th, 24th hour pain, sedation, and alertness between the groups. Conclusion: Premedication with 45 mg oral dextromethorphane decreases post operative pain in first hour, so it can be used as an alternative analgesic drug along with narcotics.
Hassan Jamali, Azhdar Heydari,
Volume 23, Issue 3 (5-2019)
Abstract
Background: Dextromethorphan (DM) as a non-opioid anti-cough has neuroprotective effects. Combination of DM with quinidine decreases rapid metabolism of DM to dextrorphan (DX). This study aimed to examine the effects of acute administration of quinidine, DM and combination of dextromethorphan/quinidine (DM/Q) on pentylenetetrazole (PTZ)-induced clonic and tonic seizure thresholds in mice.
Materials and Methods: A total of 84 male mice of the NMRI strain (20-25 g, n=7 in each group) were used in this study. Different doses of DM (5, 10, 25 and 50 mg/kg), quinidine (10, 20, and 30 mg/kg) and DM/Q (5/20, 10/20, 25/20, and 50/20 mg/kg) were intraperitoneally administrated 30 min before the seizure induction. Intravenous infusion of PTZ was used to induce seizure induction and latencies to the occurrence of general clonus and tonic hind limb extension were recorded and converted to the seizure threshold dose.
Results: Quinidine at a dose of 30 mg/kg significantly increased the threshold of tonic seizure (P<0.05). DM at doses of 25 and 50 mg/kg significantly increased threshold of clonic (P<0.05) and tonic (P<0.001) seizures. DM/Q at dose of 50/20 mg/kg significantly decreased the threshold of clonic and tonic seizures (P<0.001).
Conclusion: According to the findings of this study, different effects of DM on clonic and tonic seizure thresholds may represent different sensitivities of forebrain and hindbrain seizure circuitry to DM. Also, decreased effect of DM in the presence of quinidine may also be due to a change in the metabolism of DM.
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