Add Yahoo as a preferred source to see more of our stories on Google. A device that can detect the chemical in cannabis responsible for its psychoactive effects could work as an early prototype for a ...

Using a breathalyzer alone to effectively detect cannabis impairment could be a pipe dream, according to a recent pilot study spearheaded by the University of Colorado. A valuable tool over the past ...

We explore the chemistry behind how a little machine can tell how much alcohol you've had. We explore the chemistry behind how a little machine can tell how much alcohol you've had. Reactions is ...

Field breathalyzer tests are one of the ways that police in Arizona assess whether you have been drinking before driving, and to get an estimate of what your blood alcohol concentration (BAC) is.

A Breathalyzer designed to determine whether someone is currently under the influence of cannabis is being used by employers in Michigan and is now offered at several medical centers around the state.

For decades, police have used breathalyzers to test for alcohol, but they don’t have a reliable tool to measure marijuana use. That could change soon. Researchers are working to develop a breathalyzer ...

Use one of the services below to sign in to PBS: You've just tried to add this video to My List. But first, we need you to sign in to PBS using one of the services below. You've just tried to add this ...

A device that can detect the chemical in cannabis responsible for its psychoactive effects could work as an early prototype for a breathalyzer-type tool to test for marijuana, according to a recent ...