Doctor insights on:
Can Excess Caffeine Cause Rashes
Is it more likely to have an allergy to caffeine, or stimulants in general? Skin rashes appear on lower face and upper chest. Testing for this?
Quite rare: I don' recall ever seeing someone allergic to caffeine. As each stimualnt drug is quite different chemically from others an allergy to all stimulants is even less likely. There is also no skin or blood test for such an allergy but that doesn't mean it can't be done. A double-blind challenge is the method used to establish a relationship between a cause & an effect. Your local allergist can help.
Caffeine: Probably unrelated, but you need to provide more details.
When I drink a lot of caffeine (full soda, cup of coffee 5 hour energy) I get a rash, it's hard to breathe, and I start palpitating, am I allergic?
No: Caffeine consumption does not interfere with your visual field data. If, however, you are extremely jittery, you may be more nervous and overly responsive with the hand held clicker which may lead to higher percentage of false positives and fixation losses. The latter decreases the reliability of the visual died results.
Cardio workouts: Cardio work out help to develop collateral circulation.
Can drinking high quantity of caffeine cause excessive irritability, actions that resemble someone out of control, on edge, manic, hard to reason with?
Yes, it can happen: In large quantities, this can indeed happen. For some sensitive folk, less can do it. For very sensitive (allergic) folk, any can. If this is you, you need to consider reductions in quantity or avoiding it all together. I'd limit my intake to really great coffee in small amounts. It's your choice! Good luck.
Will Adderall (dextroamphetamine and racemic amphetamine) cause cravings for caffeine, sugar and excessive shopping?
Caffeine metabolism: Caffeine is metabolized by a liver enzyme. If you have a particular common gene mutation what is known as a snp (single nucleotide) polymorphism) you may be a rapid metabolizer of caffeine, which means it gets broken down more quickly generally requiring you to have to take in more before feeling any effect. If you were a slow metabolizer you would feel the effect more quickly and stronger.
Uncommon: Caffeine being a stimulant could activate itching but would be an uncommon response. However if you demonstrate the effect repeatedly, it must be valid that it affects you in that manner and I suppose you could block the reaction by taking an antihistamine a half hour before drinking a caffeinated beverage.
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