Skylark ~ you speak of Ma Huang... are you sure you're talking about Ephedrine or Ephedra?
Ephedra is the one they've been pushing in supplements (untill recently) as a healthy natural stimulant.
Ephedrine tabs contain 25mgs Eph & 200 or 400 mgs of Guaifensin ~ an expectorant. mainly made for Asthma sufferers, & usually called white crosses, brand names Two Way or Mini Thin.
all the fuss has been about Ephedra, not Ephedrine. though i'm wondering is one a derivative or concentrated form of the other??
as far as the "heart related issues" & speeding up the blood pressure... don't all stimulants do that?
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some days you're the windshield, some days you're the bug