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Acute and chronic tramadol administration impair spatial memory in rat
Ali Hosseini-Sharifabad1, Mohammad Rabbani1, Mohammad Sharifzadeh2
1Department of Pharmacology and Toxicology, School of Pharmacy and Pharmaceutical Sciences and Isfahan Pharmaceutical Sciences Research Center, Isfahan University of Medical Sciences, Isfahan, I.R. Iran.
Research in Pharmaceutical Sciences
|April 7, 2016
Summary
Tramadol hydrochloride, a synthetic opioid, impairs spatial memory in rats after single or multiple doses. Acute tramadol administration showed a more detrimental effect on memory than chronic treatment.
Area of Science:
- Neuroscience
- Pharmacology
Background:
- Tramadol hydrochloride is a synthetic opioid with a complex mechanism of action.
- Opioids can influence behavioral phenomena, necessitating investigation into their cognitive effects.
Purpose of the Study:
- To evaluate the impact of single and multiple doses of tramadol on spatial memory in rats.
- To compare the effects of acute versus chronic tramadol administration on memory function.
Main Methods:
- Rats received a single dose or daily injections of tramadol (20 mg/kg) for 21 days.
- Spatial memory was assessed using the object recognition task (ORT) after treatment.
- Exploration times and frequencies of familiar and novel objects were recorded.
Main Results:
- Tramadol significantly decreased exploration of the novel object in the ORT, indicating memory impairment.
- Both acute and chronic tramadol administration abolished the differential exploration between familiar and novel objects.
- Single-dose tramadol exhibited a more pronounced negative effect on memory compared to multiple doses.
Conclusions:
- Tramadol hydrochloride impairs spatial memory in rats following both acute and chronic administration.
- The findings suggest that tramadol's effects on memory may be mediated by its influence on various neurotransmitter systems.
- Understanding tramadol's cognitive side effects is crucial for its clinical application.
