Check the Temperature Never leave medicine in the glove compartment or the trunk, even inside luggage. For medications that must be refrigerated, like some liquid drugs or meds you inject, put them in an insulated lunch bag and add a freezer pack.

For 2026 travel, the "gold standard" is to keep all medication in its original, pharmacy-labeled container within your carry-on bag. Never pack essential meds in checked luggage, as temperature fluctuations in the cargo hold can degrade the chemicals, and lost bags can leave you without vital treatment. If your medication requires refrigeration (like insulin or certain biologics), use a TSA-approved insulated travel cooler with gel packs. It is also wise in 2026 to carry a digital or physical copy of your prescription and a doctor’s letter, especially for international travel where certain common US drugs (like Adderall or strong painkillers) might be strictly controlled or illegal. For 2026 flyers, remember that liquid medications are exempt from the 3-1-1 rule, but you must declare them to security officers for separate screening to avoid delays or potential confiscation of expensive specialty treatments.