On Wed, 8 Nov 2000 14:34:16 -0800, you wrote: >...but better now than never. Ephedra is bad news. Phenylpropanolamine = (PPA, >used in OTC "weight loss" pills) and pseudoephedrine (Sudafed) deserve >similar consideration. All of these are CNS stimulants---they simulate >epinephrine's effects on vital organs, the CNS, and blood vessels. Heart >rate and blood pressure increase, as may anxiety. Divers who take them = could >well be more susceptible to underwater panic. And then there are = drug/drug >interactions, which can cause hypertension, changes in sensorium, and = any >number of problems that are well known to the FDA but are not widely >publicized. It's PPA that's in the news lately.. there's serious statistical evidence that phenylpropanolamine can cause an increased risk of hemorrhages in women. It's a sympathomimetic.. a compound that mimics stimulants of the nervous system found naturally in the body. So is Pseudoephedrine (Sudafed). There may be useful parallels pertaining to PPA & Ephedra or Pseudafed Re: diving, just remember, caution is a GOOD thing >The bottom line: If you take a medication or, especially, a dietary >supplement, do your homework. The FDA approves medications based on >recommendations of physicians who work with the manufacturer and/or who >participate in clinical trials. More frightening are the unregulated = drugs, >such as ephedra, ma huang, homeopathic remedies and botanicals. These >remedies usually are extracts of herbs, barks, or other plant substances= and >can have extremely potent effects. The consumer has no way of knowing = what >s/he's ingesting. Bottom line, the jury hasn't even plugged in the coffeepot.BUT!! there is some real evidence that any CNS stimulant should be contra-indicated in diving. PPA turns up in a MULTITUDE of OTC (Over-The-Counter) products. Many of the most popular cold remedies (Alka-Seltzer Cold Plus, Tavist D, Triaminic) contain PPA.. most of the rest contain pseuoephedrine..This is a no-brainer.. IF YOU'RE SICK> DON'T DIVE!!! Reality sucks, don't it? >Don't wait for a government agency or for anyone to warn you about these >issues. Ephedra should have been pulled from the market years ago. I = predict >that we'll see either 1) more of these "natural" substances being banned= by >FDA or 2) the pharmaceutical companies getting into the business of >"legitimizing" the so-called natural medications. The "snake oil" effect= and >profit potential create too lucrative a marketing opportunity to pass = up. > >Best, >Barbara/San Francisco If they pull ephedra, they'll have to pull Starbuck's, too. and the PC's are ALREADY pressing the snake oil. I think we agree on 2 basic points 1) all decongestants are stimulants 2) divers should avoid stimulants while they're diving >----- Original Message ----- >From: "anthony rue" <true@gu*.co*> >To: <quest@gu*.co*> >Sent: Tuesday, November 07, 2000 7:37 AM >Subject: Stroke Alert (ephedra health risk) > > >> http://www.nejm.org/content/haller/1.asp >> >> Just released this morning, by The New England Journal of Medicine: >> >> Because of its potential public health implications, this article is = being >> released before its publication date. The final version of the report = will >> be published on December 21. >> >> Dietary supplements that contain ephedra alkaloids (sometimes called = ma >> huang) are widely promoted and used in the United States as a means of >> losing weight and increasing energy. In the light of recently reported >> adverse events related to use of these products, the Food and Drug >> Administration (FDA) has proposed limits on the dose and duration of = use >of >> such supplements. The FDA requested an independent review of reports = of >> adverse events related to the use of supplements that contained = ephedra >> alkaloids to assess causation and to estimate the level of risk the = use of >> these supplements poses to consumers. >> ... >> >> Ephedrine and related alkaloids have been associated with adverse >> cardiovascular events, including acute myocardial infarction, severe >> hypertension, myocarditis, and lethal cardiac arrhythmias. (10,11) >> Constriction of coronary arteries and, in some cases, vasospasm are >believed >> to be the mechanisms of myocarditis and myocardial infarction. The >> adrenergic effects of ephedrine shorten cardiac refractory periods, >> permitting the development of reentrant cardiac arrhythmias. Ephedrine= can >> predispose patients to both hemorrhagic and ischemic stroke. (12) >> Subarachnoid hemorrhage is thought to be a result of the hypertensive >action >> of ephedrine, which can be short lived, or of cerebral vasculitis, = which >has >> been described in association with a variety of sympathomimetic drugs. >> (13,14) Thrombotic stroke is presumably related to vasoconstriction of >large >> cerebral arteries, which leads to local thrombosis as a result of = stasis >and >> sympathomimetic-induced platelet activation. >> >> Because of the severity of the adverse events that we reviewed and, in >> particular, the occurrence of events that caused permanent disability = and >> death, we conclude that dietary supplements that contain ephedra = alkaloids >> pose a serious health risk to some users. Although the incidence of >serious >> adverse effects cannot be determined from our analysis, our findings >arouse >> concern about the risks of these products, given that they have no >> scientifically established benefits. Our findings indicate the need = for a >> better understanding of the determinants of individual susceptibility = to >the >> serious adverse effects of dietary supplements containing ephedra >alkaloids >> so that appropriate dosing guidelines and warnings can be devised. >> >> >> --------------------------------------------------------------------- >> To unsubscribe, e-mail: quest-unsubscribe@gu*.co* >> For additional commands, e-mail: quest-help@gu*.co* >>
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