Jun 1, - Others have described Klonopin's effects as beginning with an energized But if you like the high it gives you, and keep increasing your dosage, the great frequency in deaths from so-called combined drug intoxication, or CDI. and most widely abused drugs: temazepam, alprazolam, and lorazepam. Jump to Side effects - While these drugs share several side effects, each drug can cause some unique side effects. For example, Xanax can cause Missing: vyvanse. Feb 8, - This may lead to a reduction in amphetamine reward and dosage might . line of 30mgs adderall, was feeling it a little, and then decided to take 1mg xanax. in high dosage, but from her research Vyvanse 30mg = 20mg adderall. other times, I'll take the amp first, then an hour or two later dose w/ Ativan.