Another clinical trial in the United Kingdom is investigating the efficacy of modafinil, in conjunction with voucher-based contingency management, among patients receiving opioid substitution treatment and using crack cocaine.
Et andet klinisk forsøg i Det Forenede Kongerige undersøger effektiviteten af modafinil sammen med kuponbaseret contingency management blandt patienter, der får opioidsubstitutionsbehandling, og som bruger crackkokain.