Washington DC: As cannabis is being legalised in more and more jurisdictions, more than a third of young adults report using both cannabis and tobacco or nicotine products, providing a unique challenge to public health officials, a recent study suggests. As part of the study, researchers examined the many different ways that cannabis and tobacco or nicotine products are used together -- a byproduct of the introduction of new vaping devices and other delivery methods.

Among those surveyed, young adults who used cannabis and tobacco or nicotine together in some way (either using one right after the other or by mixing the products together) tended to consume more marijuana and tobacco or nicotine products, and report poorer functioning and more problematic behaviours compared to those who used did not use both products together.