title: Amphetamine and barbiturate effects on two tasks performed singly and in combination.
mesh_terms: D001288:Attention / Q000187:drug effects; D006591:Hexobarbital / Q000494:pharmacology*; D006801:Humans; D009048:Motor Skills / Q000187:drug effects*; D010645:Phentermine / Q000494:pharmacology*; D010919:Placebos; D013647:Task Performance and Analysis
chemical_list: D010919:Placebos; D006591:Hexobarbital; D010645:Phentermine