Virginia Tech researchers surveyed 350 people and found painkillers followed by opioids like fentanyl required the most quit attempts. Cannabis was harder to quit than nicotine. Virginia Tech researchers surveyed 350 people and found painkillers followed by opioids like fentanyl required the most quit attempts. Cannabis was harder to quit than nicotine.
The most addictive drugs ranked: Fascinating analysis looks at a dozen vices, including alcohol, nicotine
