but wikipedia says this:
Beta blockers must not be used in the treatment of cocaine, amphetamine, or other alpha adrenergic stimulant overdose. The blockade of only beta receptors increases hypertension, reduces coronary blood flow, left ventricular function, and cardiac output and tissue perfusion by means of leaving the alpha adrenergic system stimulation unopposed.
So I'm really somewhat concerned. My heart is supposedly normal but I got two false positives, and the presence of false positives may still be more potentially troublesome than the presence of no false positives. I really don't want to have cardiac enlargement or sudden death, but most of the time, I'm academically nonfunctional without stimulants. But chronic tachycardia might cause this too.
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Right now I'm thinking of Carvedilol (since it doens't seem to affect blood glucose) or an ACE inhibitor. I fully know that Adderall is somewhat neurotoxic, but I really need it for now (I might switch to ritalin + deprenyl later).