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Qualitative discrimination between cocaine and amphetamine in rats
European Journal of Pharmacology
|July 14, 1988
Summary
Rats learned to distinguish between amphetamine and cocaine. Saline injections revealed dose-dependent effects, indicating a qualitative drug discrimination develops at specific amphetamine and cocaine dose pairings.
Area of Science:
- Pharmacology
- Neuroscience
- Behavioral Science
Background:
- Drug discrimination tasks are crucial for understanding subjective drug effects.
- Differentiating stimulant drugs like amphetamine and cocaine is essential for addiction research.
Purpose of the Study:
- To investigate if rats can discriminate between specific doses of amphetamine and cocaine.
- To examine the effects of saline injections on lever selection after drug training.
Main Methods:
- Rats were trained in a two-lever drug discrimination task.
- Amphetamine (1 mg/kg) was paired with different doses of cocaine (5, 10, 12.5 mg/kg).
- Saline tests were conducted to assess lever preference.
Main Results:
- Rats successfully discriminated amphetamine from cocaine at the tested doses.
- With lower cocaine training doses (5 mg/kg), saline prompted cocaine lever selection.
- Higher cocaine training doses (10, 12.5 mg/kg) resulted in dose-related, equally distributed lever selection after saline.
Conclusions:
- Rats can develop a qualitative discrimination between amphetamine and cocaine at specific dose combinations.
- The training dose of cocaine influences lever selection during saline tests, suggesting dose-dependent subjective effects.