Generic lisdexamfetamine vs brand Vyvanse. Any difference in how long it lasted?

A duration change after switching from brand Vyvanse to generic lisdexamfetamine can happen for some people, but it is not established that the generic always lasts a shorter day or always matches the brand hour for hour. Lisdexamfetamine, as Vyvanse and as generics, is used for ADHD in Canada, and generic monographs exist. Health Canada approval means a generic met Canadian standards for that product. If the change is persistent, distressing, or affecting daily functioning, bring a brief timeline to the prescribing clinician rather than changing the dose independently. Related reading: https://www.fastreat.com/en/blogs/adhd-medication References: https://www.caddra.ca/wp-content/uploads/CADDRA_ADHD-Medication-Chart_May2026.pdf https://www.caddra.ca/wp-content/uploads/Canadian-ADHD-Practice-Guidelines-4.1-January-6-2021.pdf