This is an academic paper that uses a surveillance technique to study national changes in illicit drug use during the coronavirus pandemic using urinary drug screens. Findings show that illicit drug use has increased during the pandemic, including heroin, fentanyl, cocaine, and methamphetamine use.
Wainwright, J.J., Mikre, M., Whitley, P., Dawson, E., Huskey, A., Lukowiak, A., Giroir, B.P. (2020). Analysis of Drug Test Results Before and After the US Declaration of a National Emergency Concerning the COVID-19 Outbreak. JAMA, Sep 18:e2017694.