Fentanyl is the most powerful drug which often used for severe surgical or cancer-related pain. But the smaller dose of fentanyl can lead to overdose issues as it is 50 to 100 times more potent than morphine. As it has no colour, taste, or smell, it is impossible to detect if it has been added to street drugs. It is highly potential for addiction and dependence. But this drug not only causes dependence, but it also takes the lives significantly. For this type of life-threatening drug, recognizing the red flags is necessary to seek help at the correct time. So let's understand the signs of fentanyl addiction and treatment for it.