Switching from Adderall XR to Vyvanse: why would a doctor recommend this?

Usually because of side effects or a coverage change, not because Adderall XR failed outright. Both are amphetamine-based, so a doctor might suggest Vyvanse specifically for its prodrug mechanism, which tends to produce a smoother onset and offset with less potential for misuse, or because Vyvanse's once-daily dosing better matches someone's daily routine. Other common reasons include Adderall XR's release profile wearing off unevenly for some people, causing a harder afternoon crash, or a formulary change through insurance making Vyvanse the more accessible option. If the change is persistent, distressing, or affecting daily functioning, contact your provider through the FasTreat portal rather than changing medication on your own. References: https://www.caddra.ca/wp-content/uploads/CADDRA_ADHD-Medication-Chart_May2026.pdf