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ADHD Medications: Adderall vs Vyvanse, How Stimulants Work and Complete 2026 Treatment Guide

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.