How does fentanyl come out of your system?

Answer:
Normally it comes out through the body's regular excretion process - kidneys, etc. During major withdrawals though, and if your dosage is high enough, it'll sweat out through your pores.
First answer by TSD -RAVEN-. Last edit by TSD -RAVEN-. Contributor trust: 279 [recommend contributor recommended]. Question popularity: 1 [recommend question].