Crossing the US border with Vyvanse. What documentation do you actually carry?

Crossing the US border with Vyvanse is travel with a controlled medicine, not a casual supplement in a pill case. Usual practical advice is to keep the medicine in the original labelled container, carry a copy of the prescription or a doctor's letter, and declare it if asked. Stimulants are controlled in both Canada and the United States. 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://www.cbsa-asfc.gc.ca/travel-voyage/items-articles-eng.html https://www.fda.gov/drugs/fda-drug-info-rounds-video/traveling-prescription-medications https://www.cbp.gov/travel/us-citizens/know-before-you-go/prohibited-and-restricted-items

I carried a crumpled letter and the original Vyvanse bottle in my backpack like they were going to quiz me. Nobody asked. I still felt better having the labelled vial instead of a weekly box. I copied the prescription at the pharmacy counter before I left. I did not dump capsules into a mint tin. Only my anxious crossing, not a document checklist that always works.