Methamphetamine is routinely prescribed for the treatment ADHD (also obesity and narcolepsy, amongst other off-label uses), and is sold under the brand name of Desoxyn (in the US). Meth IS medication!
On that note, maybe don’t believe everything you read about drugs online.
Isn't it Dexamphetamine that is the routine treatment for ADHD? As far as I understood, methamphetamine has much stronger effects than dexamphetamine, also meth been prone to cause more adverse effects and have more neurotoxicity than the dex counterpart?
Maybe I'm completely off base here.
A lot of the information about methamphetamine is, bluntly, propaganda. For example, there seems to be nothing about methamphetamine that is uniquely harmful to teeth, but "meth mouth" is a common trope. When taken orally at therapeutic doses it's not clear methamphetamine is any more harmful than dextroamphetamine, but it's certainly possibly it has more scope for abuse. It's certainly dangerous at high doses! Unfortunately it's hard to find hard data and not drug war propaganda.