Weed vs. vyvanse (lisdexamfetamine): While there may not be a physical harm to follow vyvanse (lisdexamfetamine) with mj, the effects of mj are diametrically opposed to the desired effect of vyvanse (lisdexamfetamine) and there you will get less benefit from the vyvanse (lisdexamfetamine).
Answered 3/27/2015
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