sedative
sed-uh-tiv
noun
A drug that calms or reduces anxiety.
"The doctor prescribed a mild sedative for her nerves."
adjective
Having a calming effect.
"The music had a sedative effect on the restless child."
Thesaurus
Synonyms: ataraxic, tranquillizing, tranquilising, tranquilizing, tranquillising, depressant, ataractic, sedative drug, downer