Legal high refers to any substance or drug that can produce a euphoric state but is not banned or prohibited by the government. However, the term legal high is controversial as it often implies that these drugs are safe and legal to use. There are several alternative terms that can be used to describe these substances, such as research chemicals, novel psychoactive substances (NPS), party pills, herbal highs, or synthetic cannabinoids. These terms are more accurate and can prevent people from believing that legal highs are completely safe or free from risks. It is important to note that the use of legal highs can still pose serious health risks, including addiction, overdose, psychosis, and even death.