Traveling internationally with medication in 2026 requires careful documentation and adherence to "originality" rules. You should always carry a copy of your prescription and, for controlled substances (like Adderall or strong painkillers), a "Letter of Medical Necessity" from your doctor. A critical peer-to-peer "safety rule": never transfer pills into daily organizers for international flights; keep them in their original pharmacy packaging with your name clearly visible to avoid being flagged by customs for drug trafficking. If you carry liquid medications or injectables (like insulin) exceeding 3.4oz (100ml), you must declare them at security, where they are exempt from standard limits. In 2026, many countries (like India) now encourage the use of digital declaration apps (e.g., the Atithi App) to log medications before you land, ensuring a smoother transition through the "red channel" at customs.