How long will Fentanyl show up in saliva swab drug test for?

If you are using Fentanyl legally, and have a current prescription, this should not be a concern. Just show proof of you current script with a picture ID and a notation will be attached to your tox screen to disregard this if it is within the therapeutic dosage parameters of your prescription.

This does not apply in some staes, and you will be charged with a DUI if there is an MVA involved and/or you have alcohol in your system as well.

even if you are using this in an illicit way, i belive that fentanyl only stays in your body for 8-24 hours, so after a day, i dont think it will show up on a swab test.