Obviously had some severe burn injury probably with skin grafts. Not sure why they included her unless those burns were from freebasing or something (directly attributable to meth/drug use).
I tried meth way back in the early 90s (snorted, not smoked). While the high was pretty awesomely intense (and lasted a long time), I felt so fucking horrible after I came down that I swore I'd never touch that shit again. I had a splitting headache, and I slept on and off the entire next day, even after I had slept about 12 hours. Like a bad hang-over, squared. It took two full days for me to feel fully recovered. You'd have to be a special kind of stupid to say "Oh my god, I feel fucking horrible now that I came down, I need to do more of that." I've never touched it again, at least not the street drug.
Ironically, I get legal access to amphetamines due to narcolepsy, including methamphetamine preparations, but I don't take it much because of the side-effects. And no, the pharmaceutical amphetamine is nowhere near as potent or intense, at least not in the recommended dosages. Maybe if you took three or four times the prescribed dose or something.