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Originally Posted by thenonsequitur
Whatever you say. But I too ended up in the emergency room on a caffeine overdose though (from just 200 milligrams, and combined with whatever else in an energy drink).
I'm know that it's possible to overdose on caffeine. I'm just saying it's incredibly unlikely to happen from just drinking one Rockstar, or one Red Bull, or one cup of strong coffee. And nearly impossible if you use caffeine regularly. The guy also sat in a car full of detailing chemicals and has some kind of ocd... I'd blame both of these for his "panic attack" before an energy drink.
This is a great alternative to Google for finding scientific articles: http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed
If you aren't at a university, you won't be able to access the full-text articles, but at least you'll be able to read the abstracts. Here's an interesting review on caffeine and cardiovascular health:
Cardiovascular effects of coffee: is it a risk factor? Prog Cardiovasc Nurs. 2005 Spring;20(2):65-9. Sudano I, Binggeli C, Spieker L, Luscher TF, Ruschitzka F, Noll G, Corti R. Department of Internal Medicine, Cardiology Unit, University Hospital Zurich, Zurich, Switzerland.
Intake of coffee, one of the most common beverages worldwide, is often reported as a cardiovascular risk factor; however, definitive data are lacking. Acute intake of coffee or beverages containing caffeine can increase blood pressure, heart minute volumes, and cardiac index, as well as activate the sympathetic nervous system in nonhabitual coffee drinkers. Interestingly, this is not observed in habitual coffee drinkers. Restriction of coffee or caffeinated beverages is no longer indicated in the seventh report of the Joint National Committee on Prevention, Detection, Evaluation, and Treatment of High Blood Pressure (JNC 7) guidelines for the treatment of hypertension. In fact, no clear association between coffee and the risk of hypertension, myocardial infarction, or other cardiovascular diseases has been demonstrated. In contrast to early studies, recent research indicates that habitual moderate coffee intake does not represent a health hazard and may even be associated with beneficial effects on cardiovascular health.
And here's a study that shows a combination of caffeine and taurine (in the same quantities as Red Bull) actually lowers heart rate:
A combination of caffeine and taurine has no effect on short term memory but induces changes in heart rate and mean arterial blood pressure. Amino Acids. 2006 May 15. Bichler A, Swenson A, Harris MA. Biology Core Curriculum, University of Wisconsin, Madison, WI, U.S.A..
Red Bull energy drink has become extraordinarily popular amongst college students for use as a study aid. We investigated the combined effects of Red Bull's two active ingredients, caffeine and taurine, on short term memory. Studies on the effects of these two neuromodulators on memory have yielded mixed results, and their combined actions have not yet been investigated. In this double-blind study, college student subjects consumed either caffeine and taurine pills or a placebo and then completed a memory assessment. Heart rate and blood pressure were monitored throughout the testing period. The combination of caffeine and taurine had no effect on short term memory, but did cause a significant decline in heart rate and an increase in mean arterial blood pressure. The heart rate decline may have been caused by pressure-induced bradycardia that was triggered by caffeine ingestion and perhaps enhanced by the actions of taurine.
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