15 min: The effects of the caffeine in soda should take effect within 15 minutes. Caffeine can raise blood pressure very slightly, but this should not be a problem unless you already have extremely high and uncontrolled blood pressure, or you are drinking gallons of soda a day, which wouldn't be good for many reasons. Hope this helps!
Answered 9/29/2016
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A doctor has provided 1 answer
A doctor has provided 1 answer
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