The use of stimulant substances for non-medical purposes critically contributes to global problems related to substance use. Over 27 million people worldwide have used amphetamines, methamphetamines, and prescription psychostimulants, and around 19 million have used cocaine in 2018. 1 An increase in the burden of (psycho)stimulant use disorder (PSUD), both amphetamine-type (AUD) and cocaine-type (CUD), reflect those trends. From 2008 to 2017, the disability-adjusted life years (DALYs) attributable to CUD increased by 17% and AUD by 5%. The economic burden of PSUD varies across income status with CUD and AUD accounting in 2019 for 0.01 and 0.02% of the DALYs in low income and lower-middle income countries, as compared to 0.16% and 0.09 respectively in high income countries. 2 However, regional differences are also relevant: CUD is particularly burdensome in Tropical Latin America, where its prevalence is only outnumbered by North America; meanwhile, the regions with highest prevalence of AUD are East and South-East Asia. 3 Moreover, around 11.3 million people worldwide use drugs intravenously including opioids, amphetamines, methamphetamines, and cocaine. The concurrent use of an injected stimulant and an opioid increases the risk of medical problems, overdoses, and deaths in comparison to the injection of only one substance. 1,3 In the US, up to a third of opioid overdose deaths involved the concurrent use of a stimulant.