I had a friend go in and the screen said he tested positive for herion, but he swears up and down all he took was a fentanyl patch... just wondering if he is telling the truth or does herion only come up as herion and fentanyl only shows up as fentanyl... please help
- Fentanyl Information for Consumers
- Fentanyl Information for Healthcare Professionals (includes dosage details)
- Side Effects of Fentanyl (detailed)
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