What Does Heroin Do to the Brain? Effects, Risks, and Treatment Learn what heroin does to the brain and how it affects mood, memory, judgment, and decision-making. Heroin can cause intense pleasure, slow breathing, and lead to dependence and addiction. Discover the short-term and long-term effects of heroin use and understand how professional treatment can support recovery and improve overall health. https://www.athenabhs.com/blog..../what-does-heroin-do