Tusi is a recreational drug that contains a mixture of different psychoactive substances, most commonly found in a pink-dyed powder known as pink cocaine. It is believed to have originated in Latin America, specifically Colombia around 2018. Ketamine and MDMA are the most common ingredients, although cocaine, methamphetamine, oxycodone, caffeine and various cathinones are found as well. There are no standard proportions of the constituent drugs.