What it actually means
Stimulants act on the brain's dopamine system: then the system adapts.
Stimulant use disorder is a chronic condition involving the compulsive use of stimulant drugs despite negative consequences. The category includes illicit stimulants (cocaine and methamphetamine) and the misuse of prescription stimulants, whether prescribed to the woman herself or obtained from someone else.
Stimulants act on the brain's dopamine system, producing a surge of energy, focus, and reward. Over time, the brain adapts. The same dose stops producing the same effect, and the natural baseline (without the substance) feels flat, foggy, or unbearable. That shift is biological, not a matter of character.