Let's make a comparison:
Say you snort 60mg Adderall.
Within a few minutes, your heart will begin beating, you will get the 'tingles' and you will begin the comeup.
10 minutes after that you'll be tweaking on Adderall...euphoria, sexual arousal, etc. You've got energy..probably talk a lot, you know the routine.
45 minutes, give or take, later, you hit the comedown. For some of us, we get depressed, others just 'jones' for more Adderall.
Now. Let's say you snort 75mg of high quality crystal meth amphetamine. The comeup will be the same...heartrate increase, 'tingly' sensations, perhaps you start to clench your jaw.
Then hits the euphoria. You'll notice your hands clench, you're talking like a madman, etc. Then you decided the bathroom needs cleaning. So you clean it. For a VERY long time. Then your room looks dirty...you clean it. Then you decide to start construction on the airport in your backyard you've been wanting to build so badly. You get the point.
The original euphoria is gone, but you still feel 'good' and have loads of energy.
Depending on your tolerance, method of ingestion, and dosage, you *can* continue on this path for 5-8 hours...Some may take another bump here and there...
Then the comedown hits.
If you have more meth, you'll do it, but the euphoria is lessened, if there at all....then the cycle starts over.
Either you do more meth, or you try to sleep. Which is not possible. You will lay in bed, heart racing, mind racing, probably horny.
YMMV, but meth is fun...until the comedown...and the longer you stay up, and the more meth you do, the harder the comedown is.
Most people I know do meth, then on the comedown swear "I'll never do this again!"
Comparing Adderall to Meth is like Hydrocodone to Heroin.
The *general* feelings are the same, but the overall high is not something you compare.