Key result
Intranasal cocaine during task performance raises heart rate ~19 bpm and MAP beyond either alone.
Why the study?
Does the combination of intranasal cocaine and task performance increase heart rate and blood pressure more than either activity alone in adult males with a history of cocaine use?
Does the combination of intranasal cocaine and task performance increase heart rate and blood pressure more than either activity alone in adult males with a history of cocaine use?
The combination of cocaine administration and environmental stressors (task performance) produces additive cardiovascular effects, increasing heart rate and blood pressure more than either factor alone.
Answers are grounded in this paper and cite their sources.
Additive effects heighten acute risk during cocaine use with stress; leaves open generalizability beyond controlled settings.
Eleven adult male subjects with histories of cocaine use participated in daily experimental sessions consisting of resting cardiovascular (heart rate, blood pressure) baseline measures followed by intranasal cocaine (4, 48 or 96 mg) administration and further cardiovascular monitoring. Subjects in Group I performed a learning task before and after cocaine administration, while subjects in Group II rested. Cocaine administration alone significantly increased heart rate up to 10 beats per minute (bpm) and mean arterial pressure (MAP) up to 15 mm/Hg. Task performance alone increased heart rate up to 8 bpm and MAP up to 10 mm/Hg. In combination, increases in heart rate up to 19 bpm and MAP up to 18 mm/Hg were observed. Thus, combinations of cocaine administration and task performance increased heart rate and blood pressure above levels observed following the occurrence of either activity alone. These results indicate the importance of understanding the effects of drugs within the environmental context in which they are taken.
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Foltin et al. (1988) studied Histories of cocaine use (n=11). Intranasal cocaine and task performance vs. Resting or either activity alone was evaluated on Heart rate and mean arterial pressure. Intranasal cocaine combined with task performance increased heart rate up to 19 bpm and mean arterial pressure up to 18 mm/Hg, which was greater than the effects of either activity alone.
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