Fentanyl now shows up in counterfeit pills made to look like Xanax, Percocet, or oxycodone, and it gets mixed into heroin, cocaine, and other street drugs. A lot of people take it without knowing it is there. That is what makes the signs worth learning. When you can spot slowed breathing, sudden drowsiness, pinpoint pupils, or a change in someone's usual patterns, you can act before it becomes an overdose. Early recognition is not overreacting. It buys time, and time saves lives.