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Published on: February 10, 2013

Cardiovascular and renal actions of methylxanthines

B B Fredholm

    Progress in Clinical and Biological Research
    |January 1, 1984
    PubMed

    Insights

    Caffeine and theophylline can impact the cardiovascular system, but effects are usually limited and tolerance develops. Some individuals may be more susceptible due to adenosine interactions.

    Area of Science:

    • Pharmacology
    • Cardiovascular Physiology

    Background:

    • Caffeine and theophylline are methylxanthines with known cardiovascular effects.
    • Understanding their impact on the cardiovascular system is crucial for public health.

    Purpose of the Study:

    • To evaluate the cardiovascular effects of caffeine and theophylline.
    • To determine the significance and variability of these effects in the general population and susceptible individuals.

    Main Methods:

    • Review of existing literature on caffeine and theophylline's cardiovascular actions.
    • Analysis of direct and indirect mechanisms of action, including adenosine antagonism.

    Main Results:

    • Both caffeine and theophylline can affect the cardiovascular system, though effects are often limited, even with intravenous theophylline.
    • Rapid tolerance develops to caffeine's cardiovascular effects.
    • In the general population, caffeine's impact is minimal compared to daily life stressors.

    Conclusions:

    • Cardiovascular effects of commonly consumed caffeine are unlikely to be significant for most people.
    • Individuals with high adenosine levels or receptor density may exhibit heightened sensitivity.
    • Susceptibility to caffeine's cardiovascular effects varies among individuals.

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