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. 1988 Jun;85(12):4483–4485. doi: 10.1073/pnas.85.12.4483

Endogenous adenosine and hemorrhagic shock: effects of caffeine administration or caffeine withdrawal.

L A Conlay 1, G Evoniuk 1, R J Wurtman 1
PMCID: PMC280454  PMID: 3380802

Abstract

Plasma adenosine concentrations doubled when rats were subjected to 90 min of profound hemorrhagic shock. Administration of caffeine (20 mg per kg of body weight), an adenosine-receptor antagonist, attenuated the hemorrhage-induced decrease in blood pressure. In contrast, chronic caffeine consumption (0.1% in drinking water), followed by a brief period of caffeine withdrawal, amplified the hypotensive response to hemorrhage. These data suggest that endogenous adenosine participates in the hypotensive response to hemorrhage and that caffeine may protect against, and caffeine withdrawal may exacerbate, this response.

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Selected References

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