Introduction. Prescription stimulant non-medical use (NMU) is a persistent, national dilemma (1–4).Medications containing amphetamines (e.g., Adderall, Vyvanse) or methylphenidate (e.g., Ritalin, Concerta, Focalin) are considered the most widely prescribed stimulants in the United States (5, 6), and are regarded as the most efficacious drugs in …Web