Question about potent Stimulates

I was reading about Desoxyn on Lexicomp and found this interesting tidbit in adverse effects: " • CNS effects: Amphetamines may impair the ability to engage in potentially hazardous activities; patients must be cautioned about performing tasks which require mental alertness (eg, operating machinery or driving)." I believe this to be an error. Amphetamines and methamphetamine are know for increasing focus and ability to perform tasks at a faster rate. Can anyone link me to a... Question about potent Stimulates
Source: Student Doctor Network - Category: Universities & Medical Training Authors: Source Type: forums