You’re at a party and a joint is being passed around. The room is filled with smoke and you start to wonder, will I get a contact high from weed? Is a contact high even real?
A contact high—also known as a secondhand high—is the idea that secondhand exposure to cannabis smoke can get a person stoned or even leave them with THC in their system. For nonsmokers, this can lead to worries: Can you fail a drug test from a contact high? Can you wind up accidentally stoned?
These are reasonable questions to ask, and fortunately, we have a pretty good idea of how a contact high works.