Dr. Joe, M.D. on Instagram: "The green whistle is a small handheld device used for pain relief. It contains a mixture of oxygen and methoxyflurane, a volatile liquid anesthetic. The green whistle is commonly used in emergency medical settings, such as ambulance services and sports events, to provide quick and effective pain relief for injuries or acute pain conditions. #ems #painrelief #opiodcrisis #ambulance #funnykids #doctor #medical"