ADHD drugs are 22% of all US pharmacy searches. This 2026 complete guide covers why stimulants calm ADHD (not worsen it), the Adderall vs Vyvanse prodrug difference, a 3-formulation comparison table, why 30mg Vyvanse ≠ 30mg Adderall, generic lisdexamfetamine from 14 manufacturers, non-stimulant options (atomoxetine, viloxazine, guanfacine), MAOI contraindication, and the 2026 shortage update.

ADHD affects 15.5 million US adults — but 36.5 percent receive no treatment, and most adults with the inattentive type were never diagnosed as children. This complete guide covers how adult ADHD looks different from childhood ADHD, the 3 DSM-5 presentations, Rejection Sensitive Dysphoria, the dopamine-prefrontal neuroscience, diagnosis criteria, the full 8-medication comparison table including stimulants, non-stimulants, and Modafinil, and the 69.6 percent comorbidity rate wi