[Psychomotor stimulants as agents for enhancing work capacity].

Amphetamine, methamphetamine, pemoline, sydnocarb and other psychomotor stimulants derived from phenylethylamine are referred as the most effective agents for an urgent increase of performance. Their positive effect is however reduced or even transformed in a nonbeneficial one if the work is of the complex nature or is performed under emotional stress, overfatigue, hypoxia, overheating. The psychomotor stimulants, in particular amphetamine and methamphetamine, can cause attacks of angina pectoris, arrhythmias, an elevation of arterial blood pressure, drug addiction, anxiety or aggressive behavior, psychotic reactions.