Consumed together, caffeine and theanine exert similar cognitive effects to that of caffeine alone, but exert opposite effects on arousal, in that caffeine accentuates and theanine mitigates physiological and felt stress responses. Headache or migraine pain is accompanied by enlarged inflamed blood vessels; caffeine has the opposite effect of reducing inflammation and narrowing blood vessels, which may relieve the pain. Sort by. Landolt, E. Werth, A.A. Borbely, D.J. Log in or sign up to leave a comment Log In Sign Up. The opposite effects of caffeine and ethanol on Daphnia magna’s heart rate James Wilson, Jessica Collette, Andrew Miller, Anh Hoang, Traci Dubose* University of Oklahoma, Department of Biology, 730 Van Vleet Oval, Room 314 Norman, OK 73019 Abstract Caffeine is used in everyday life for many to achieve the feeling of alertness; however, You could conceivably take something with an opposite effect that would make you sleepy but then you might be called Elvis. why does caffeine have the exact opposite effect on me? if i have even three sips of anything with high caffeine i fall asleep for an hour. Chemistry. share. Notably, during the light period the opposite effect was found. Caffeine is a stimulant, just like Ritalin or most of the other drugs used to treat ADHD. Posted by 5 days ago. 100% Upvoted. save. Time is the only thing that will reduce the amount of caffeine in your system. Tea is perceived as more relaxing than coffee, even though both contain caffeine. 1990 May-Jun;52(3):320-36. View entire discussion ( 15 comments) More posts from the explainlikeimfive community. Interestingly, the 24-hour values of waking, NREM sleep and REM sleep returned to control levels and the amount of waking and NREM sleep differed significantly from the acute caffeine condition (Figure 2(a)). Also, younger folks, 10 and under, something like that, can have the opposite affect. There’s no such thing as the “chemical” opposite to anything, not in the way you mean I don’t think. Caffeine effects on cardiovascular and neuroendocrine responses to acute psychosocial stress and their relationship to level of habitual caffeine consumption. Likewise, caffeine is purported to have the same effects. 14.6k. They might mask them a little, but mixing them might lead to weird side effects and other bad stuff, too. Caffeine can interact with various medications. Or, stated another way, it is the myth that stimulants cause hyperactivity and inattention in "normal" children but have the opposite effect in children in ADHD. There are things that have the opposite effect like @Fyrius mentioned, but they won’t really negate the effects of caffeine. report. Dijk. L-theanine in tea may account for the difference. People with ADHD respond counter-intuitively to all stimulants, for the same reason. It can cause your body to break down a medication too quickly so that it loses its effectiveness. best. Elvis. To address these issues, the … hide. In fact, caffeine can have the exact opposite effect, wreaking havoc on our body and forcing fact to be stored through the belly area. However, there is some evidence that once the cognitive but also the NPS symptoms are developed, caffeine may exert opposite effects. why is that? 0 comments. 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