psychostimulant
/ˌsʌɪkəʊˈstɪmjʊlənt/ /ˌsʌɪkəʊˈstɪmjʊl(ə)nt/Medicine and Pharmacology
noun
A drug that stimulates the activity of the mind or nervous system.
adjective
That increases a person's activity and alertness; stimulatory; antidepressive.
Origin
1960s. From psycho- + stimulant.