Caffeine attenuates vasovagal reactions in female first-time blood donors.

@article{Sauer1999CaffeineAV,
  title={Caffeine attenuates vasovagal reactions in female first-time blood donors.},
  author={Linda Sauer and Christopher R France},
  journal={Health psychology : official journal of the Division of Health Psychology, American Psychological Association},
  year={1999},
  volume={18 4},
  pages={403-9}
}
The experience of vasovagal reactions during blood donation (e.g., faintness, dizziness, lightheadedness) can be a deterrent to repeat donation. Because these reactions are associated with decreases in blood pressure, caffeine was examined as a potential modulator of vasovagal reactions by virtue of its pressor effects. Using a randomized, double-blind design, 62 female undergraduate 1st-time blood donors received either 0, 125, or 250 mg of caffeine prior to blood donation. Participants who… CONTINUE READING

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