Putting aside other factors for a moment, a rigorous test surely depends on the dose. Stimulants like lisdexamfetamine can be titrated over a period of several

Putting aside other factors for a moment, a rigorous test surely depends on the dose. Stimulants like lisdexamfetamine can be titrated over a period of several weeks to determine effectiveness and tolerance of the dose, which are unknown until tested - that doesn't seem quick to me and indicates that clinicians can't expect a binary response from a one-off dose.