What is a controversial sedative?

Something that relaxes you, like a Valium

communism is controversial because there isn't a variety of things to do with a communist government. the government tells you what job to have and what you get paid. in a communist government there...

'Controversial' means marked by or capable of arousing controversy

Probably hundreds of millenniums ago, when the first early hunter-gatherer happened upon an opium poppy. Sedatives were not invented, they were discovered.

It is. It usually does cause sedation when taken.