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Vyvanse (lisdexamfetamine dimesylate)

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Old 05-09-09, 02:34 PM
leana leana is offline
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is vyvanse and dexedrine the same on drug tests?

a friend of mine takes vyvanse in the morning,and dexedrine spansules in the afternoon.he was wondering if they would show up as the same drug in a drug test?
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Old 05-09-09, 02:47 PM
Ruby85 Ruby85 is offline
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Re: is vyvanse and dexedrine the same on drug tests?

Yes, they should. In both of them, dextroamphetamine is the active ingredient.
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Old 05-09-09, 04:20 PM
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Re: is vyvanse and dexedrine the same on drug tests?

in theory, you should be tested positive for amphetamines in a standard urine / sweat drug test, yes.

it can be determined with a blood test wether you took e.g. dextroamphetamine or methamphetamine or whatever though, so, if needed, a blood test can give the 'proof' that you only took the stuff that a doctor prescribed you, not street drugs.

i dont know for what exactly you need this info, but if you're e.g. driving, you should have a note from your doctor that says you're taking prescription amphetamines for adhd, just to be save... and you dont get into trouble because of 'drugged driving' or anything.
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Old 05-09-09, 05:08 PM
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Re: is vyvanse and dexedrine the same on drug tests?

Yes, Vyvanse and Dexedrine would show up the same on drug tests.


Vyvanse is dexedrine, only with an alternation to the molecule. Dexedrine has been bonded to an amino acid to create Vyvanse and to give it the 'pro-drug' qualities.


This amino acid (Lysine) has been fused to the Dexedrine (D-Amphetamine) to create Lisdexamfetamine. This critical fusing ensures that only when one digests the medication that they can gain the effects.

Only the liver contains the enzymes necessary to break down that bond, effectively releaseing the D-Amphetamine into the system.

The science behind Vyvanse is absolutley brilliant.

Because the liver can only create so much of this enzyme to cause the hydrolysis (breaking the bond), the medicine is controlled.

The body naturally controlls how much amphetamine will reach your brain.

With adderall (and others), the amphetamine goes straight into your blood system with no monitoring. This leads to abuse, overdose, and possible brain damage.


I am no lisenced doctor or chemist. I am a high schooler. I am a vyvanse taker, and I wanted to be sure that I knew what I was injesting. Go search YouTube for "Vyvanse," and you can find a doctor talking all about it.
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