Is haloperidol a controlled substance

In England Qutiapine i{seroquel} is only available on prescription from a doctor so yes ,here it is a controlled drug.

In the USA, a controlled substance is more strictly regulated that other prescription drugs. Seroquel (Quetiapine) is available by prescription only, but it is not a government controlled substance. So, you're answer is no, it's not. That said, it is still sometimes sold as a street drug, although not as popular as benzodiazepines such as Valium or xanax (which are controlled substances). Some people think that Seroquel abuse is too common and it should be a controlled substance.