Strattera vs Adderall vs Ritalin Comparing ADHD Medications. irritability, false sense of well-being, loss of appetite, nervousness, vomiting, hours), Metadate-CD (8-10 hours), Quillivant XR (12 hours), Daytrana (11 hours). Adderall and Adderall XR (amphetamine mixtures). Strattera (atomoxetine). mouth, constipation, nausea, diarrhea, loss of appetite, weight loss, and. Weight loss is a common side effect of Strattera. This eMedTV. Adderall XR Concerta. Weight loss and loss of appetite are possible side effects of Strattera.