4-MeO-Butyrfentanyl
Aliases: 4-meo-bf
Categories
Summary
Rare and basically unknown opioid and fentanyl analogue (not to be confused with Butyrfentanyl). Virtually no reliable information exists, safe dosages are unknown. Exercise extreme caution. Overdose may result in respiratory depression. Do not mix with stimulants or depressants.
Onset, Duration & After-effects
- Onset:
- Insufflated: 1-2 minutes
- Oral: 5-15 minutes
- Duration:
- Oral: 45-120 minutes
- Insufflated: 30-75 minutes
- After-effects:
- 1-2 hours