20 Most Used Illegal Drugs in the US

3 – Fentanyl

People Identified in Labs – 163,201

Fentanyl is among the top 3 most abused drugs in the United States. People use fentanyl recreationally to feel extreme happiness. However, as the body develops tolerance to the drugs, people start using more and more, which leads to death by overdose. Some of the effects of using Fentanyl include drowsiness, nausea, confusion, respiratory and depression arrest.