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. Author manuscript; available in PMC: 2020 Nov 1.
Published in final edited form as: Drug Alcohol Depend. 2019 Aug 30;204:107515. doi: 10.1016/j.drugalcdep.2019.06.017

Table 3.

Patient perceptions of fentanyl withdrawal as compared to heroin.

Fentanyl vs. Heroin: How do you think fentanyl withdrawal compares to heroin withdrawal?
How soon withdrawal starts after last use (n=101) Starts later than heroin: 16.8%;
About the same: 29.7%;
Starts sooner than heroin: 53.5%
The severity of withdrawal (n=103) Less severe than heroin: 3.9%;
About the same: 21.4%;
More severe than heroin: 74.8%
How long withdrawal lasts (n=100) Shorter than heroin: 3.0%;
About the same: 35.0%;
Lasts longer than heroin: 62.0%