Tetrahydrofuran-Fentanyl
Limited data
Limited data
Sparse data. Doses and effects may be unreliable or untested.
- 1 source
- no dose data
- 29 combo interactions documented
- classified Research-chemical
- 1 source
- no dose data
- 29 combo interactions documented
- classified Research-chemical
Aliases: Thf-f, thff
Summary
An analogue of fentanyl that is unknown in literature. Is most likely less potent than most other analogues. Yet very few reports are around.
Tolerance
No tolerance chart. Our decay curves for opioids were estimates, and a curve can make tolerance look longer-lasting than it is, which is the dangerous direction.
Opioid tolerance drops fast when you stop, and even a few days off can be enough, so a dose that used to be normal can now stop your breathing. Overdose deaths rise sharply after prison, detox or leaving treatment, and tolerance also falls during a hospital stay. After any break, start with a much smaller amount, try a test dose first, don't use alone, and keep naloxone within reach. Alcohol, benzodiazepines, gabapentinoids and other sedatives make an opioid overdose much more likely.
Sources: FRANK: heroin · National Harm Reduction Coalition · WHO: opioid overdose · Merrall et al. 2010 · Binswanger et al. 2007 · Strang et al. 2003 · FDA 2019: gabapentinoids and breathing
Combinations
Cross-Check Tetrahydrofuran-Fentanyl with another substanceHelpful Links
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