Theophylline/ephedrine and water bio-availability 
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 Theophylline/ephedrine and water bio-availability

Does anyone know if either theophylline or ephedrine, or the two in
combination, can reduce the body's ability to make use of
available water?  I had kind of an odd experience on a group hike
recently, becoming dehyrated after about 9 hours of rigorous
hiking despite having brought 1 1/2 gallons of water (c. 6 liters).
I drank close to twice as much as anyone else, and no one else was
dehydrated.  I don't think general physical condition was an issue,
since I was in at least the middle of the pack in terms of general
stamina, so far as I could tell.

It may be that I just plain need more water than most people.  But I am
wondering if theophylline and/or ephedrine might be aggravating things.
I took a couple of Primatene tablets during the hike to control asthma
(24 mg. ephedrine, 100 mg. theophylline).  I gather that both those
{*filter*} are diuretics.  So now I'm wondering: does that mean they can
reduce the body's ability to utilize available water?  Would it be a
particularly  stupid thing to take that medication during hot-weather
exercise?  (I always assumed diuresis just meant you urinated a lot, but
that wasn't the case yesterday.)

Sat, 14 Oct 1995 05:15:09 GMT
 [ 1 post ] 

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