If you got chemically pure meth and adjusted the ratios it would be identical to adderall. It only rots the brain bc people use it to get high. It’s literally just amphetamine with the methyl group which increases its lipophilicity aka it crosses the blood brain barrier easier aka you need to take less to have more effect. I have not tested this, I am not a licensed chemist, I’'m merely an erowid drug nerd. Noone has been able to give me concrete proof this is untrue even supposed chemist nerds in comments sections (I think they weere lying bc they love sucking DARE dick) Anyway anecdote time I knew one lady who was a meth head in her yester years and now is on prescription adderall and she said it affected her basically the same until she did too much meth and did the whole junkie thing y’know stealing, no teeth, picking at skin, everyone hates you. Then like all mentally ill losers and meth addicts she “found god” and is a religious nutter now. Voted for Trump, haven’t talked to her for like 6 years bc she’s my ex’s mom.