mood-altering 
adjective
(Of a drug) capable of inducing changes of mood.Belonging to a class of mood-altering drugs, barbiturates induce relaxation and sleep....
- Abstinence from all mood-altering drugs (including alcohol) is required during the program.
- Whether mood-altering drugs are used for therapeutic purposes, as when a depressed patient is prescribed Prozac, or for recreational purposes, as when a party-goer takes Ecstasy, the chemical action is similar.