In 2026, standard over-the-counter (OTC) painkillers like Acetaminophen (Tylenol), Ibuprofen (Advil/Motrin), and Naproxen (Aleve) are perfectly safe and legal to take before or during a flight. These are excellent for managing the headaches, back pain, or "airplane ear" discomfort associated with cabin pressure changes. If you are prone to deep vein thrombosis (DVT) or leg swelling, some doctors recommend a low-dose Aspirin to help with blood flow, though you should consult a professional first. For TSA purposes, you can bring an unlimited amount of solid pills (tablets or capsules) in your carry-on; they do not need to be in their original bottles, though it is recommended for faster screening. If you prefer liquid or gel-cap painkillers, they are subject to the 3-1-1 liquids rule (under 3.4 oz) unless they are "medically necessary," in which case you must declare them for a separate inspection. Avoid strong prescription opioids unless they are specifically prescribed to you, as these can cause respiratory depression or extreme drowsiness, which can be dangerous in an emergency evacuation scenario.