Preparing for an endoscopy is critical for accurate results and patient safety. Key steps include following a prescribed diet, arranging transportation, informing your doctor about medications, adhering to post-procedure instructions, and attending follow-ups. Essential don’ts involve avoiding food or drink after the cutoff time, refraining from taking certain medications, not wearing jewelry or perfume, abstaining from smoking and alcohol, and monitoring post-procedure symptoms. Proper preparation reduces risks, prevents rescheduling, and ensures a successful procedure.