środek usypiający in English:

The doctor gave Tom a sedative.

the sedative effect of the drug

Chemical restraint This includes residents being given sedative or antipsychotic medication inappropriately, without regular review.

He believes I just gave him a sedative, but it was only a placebo.

if the patient gets agitated, the regulations say i must give them a sedative

I gave her a sedative an hour ago.

It was a long and soporific speech.