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4-FIBF (4-Fluoroisobutyrfentanyl )

4-FIBF (4-Fluoroisobutyrfentanyl )

Quick Overview

Novel Opioid. Fentanyl replacement

12+ hour duration of effects

Availability: In stock

Only 982 left

Formal Name :
N-(4-fluorophenyl)-2-methyl-N-[1-(2-phenylethyl)-4-piperidinyl]-propanamide, monohydrochloride
4-F-iBF, 4-FiBF, 4F-iBF, FIBF, p-FIBF, p-FiBF
CAS Number :
Molecular Formula :
C23H29FN2O • HCl
Formula Weight :

Delivery Time 7-14 days

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4-Fluoroisobutyrylfentanyl (also known as 4-FIBF and p-FIBF) is an opioid analgesic that is an analog of butyrfentanyl and structural isomer of 4-Fluorobutyrfentanyl .

FIBF (4-fluoroisobutyrfentanyl) and found it to be quite the unconventional fentanyl analogue.

4-Fluoroisobutyrfentanyl (4-FIBF) is a a fentanyl analogue that not only requires a higher dose than normal fentanyl analogues. The most shocking difference however, is in the 12+ hour duration of effects. This a fentanyl analogue that keeps you going for 12 hours or more, and can even be very slightly active at the 24 hour mark.

From the limited data that exist from adverse effects reports in humans, dependence potential for 4-fluoroisobutyrfentanyl is likely high as 4-fluoroisobutyrfentanyl is a μ-opioid receptor agonist that shares some similarities with opioid analgesics such as morphine, fentanyl, and heroin.