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Answer:
First off, be
aware that ephedrine and caffeine in combination
has been shown to cause side effects such as
rapid pulse, raising blood pressure, nervousness,
sleeplessness, and in extreme cases where people
are especially sensitive to it, loss of memory
and passing out. It may be better to try other
supplements before using this combination (I
actually don't recommend using it).
How long caffeine
and ephedrine keep your blood pressure raised
depends on a number of factors but generally
the effects diminish after about 4 to 6 hours
after taking it. The greatest factor that affects
this is the dosage you take. The more you take,
the longer it will take to decrease the effects
(up to a point).
Some people are
especially sensitive to the stimulating properties
of ephedrine and experience this for longer
periods. Some tolerate the combination quite
well.
It is also generally
accepted that the longer you take ephedrine,
the more accustomed your body becomes to it
and the faster the effects will diminish.
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