Alkyl nitrites enthusiasts in the U.K. can exhale (and inhale, potentially)—the Advisory Council on the Misuse of Drugs (ACMD) has advised that the inhalants known informally as poppers are not psychoactive, thus they “do not fall within the scope of the current definition of a ‘psychoactive substance’ in the Psychoactive Substances Act 2016.” A ban on producing, supplying, and importing various psychoactive substances in the U.K., including “legal highs” like synthetic cannabinoids, is set to go into effect on April 1.