Order Now: https://bigpharmausa.com/adhd/adderall-xr-20-mg/ To legally obtain Adderall XR 20 mg in Rhode Island, an online pharmacy may provide convenient ordering options with Mastercard payment support. Adderall XR 20mg is an extended-release form of stimulant medication containing amphetamine and dextroamphetamine, primarily prescribed to treat Attention Deficit Hyperactivity Disorder (ADHD).