If I work out at lunch, is that a bad time on Vyvanse?

A lunch workout on Vyvanse is not labelled as a forbidden window. There is no official protocol that exercise must happen before lisdexamfetamine or after a supposed peak. Stimulants can raise heart rate and blood pressure slightly. If the change is persistent, distressing, or affecting daily functioning, bring a brief timeline to the prescribing clinician rather than changing the dose independently. References: https://pdf.hres.ca/dpd_pm/00075816.PDF https://www.camh.ca/en/professionals/treating-conditions-and-disorders/adult-adhd/adult-adhd---treatment/adult-adhd---pharmacotherapy https://www.caddra.ca/medication-chart/