All commercial aircraft with at least one flight attendant are legally required by the FAA (and similar global authorities) to carry a comprehensive Emergency Medical Kit (EMK) and at least one first aid kit. The EMK is essentially a "doctor's bag" in the sky, containing life-saving medications like epinephrine (for allergic reactions or cardiac arrest), atropine (for heart rate), nitroglycerin (for chest pain), lidocaine, and injectable antihistamines. It also includes professional tools like a blood pressure cuff, a stethoscope, and an Automated External Defibrillator (AED). Use of the full EMK is strictly limited to licensed medical professionals who happen to be on board, though flight attendants are trained to use the AED and basic first aid supplies. In 2025 and 2026, there have been ongoing pushes to expand these kits to include newer treatments like Narcan (for opioid overdoses) and glucagon (for diabetic emergencies). While the kits are robust, they are designed for stabilization rather than long-term care, serving as a critical bridge until the pilots can perform an emergency diversion to the nearest hospital.