There is little reliable information regarding this chemical.
4-fluoroiso-butyrfentanyl is an analogue of fentanyl and is likely to be a highly potent opioid agonist that is active at extremely low quantities.
Fentanyl and its chemical derivatives have been widely used in medicine for many years for the treatment of moderate to severe pain.
These compounds belong to the opioid class. They act on opioid receptors to produce morphine like effects.
Fentanyl analogues such as 4-fluoroiso-butyrfentanyl have been associated with many deaths around the world. These compounds are extremely potent, meaning that low amounts produce overwhelming effects. They are active at the ug range which is much smaller than can be weighed with any conventional scale. Instead they are typically dissolved in a solution to create a ug/ ml solution. Such work involves careful calculation and execution that is difficult for most people to do properly and often results in a solution that is many times too strong. This means a small mistake or misjudgement with dosage will be lethal. Additionally fentanyl and its analogues can be absorbed through the skin, meaning spilling the solution on the skin can result in overdose and death. They are extremely dangerous to mix with other drugs especially depressants like alcohol, benzodiazepines and other opiates. This too has also resulted in scores of deaths of users around the world.
4-fluoroiso-butyrfentanyl is not for human or animal consumption.
The subjective effects of fentanyl and its analogues are well known and 4-fluoroiso-butyrfentanyl is likely to share many of these effects.
Online reports and scientific literature list the following effects of fentanyl and its active analogues.
Physical effects include strong levels of pain relief even at non-recreational doses. Physical euphoria is a known effect, but is known to be less intense compared to heroin or even morphine. This sensation is typically described as pleasurable with intense feelings of comfort, bliss and warmth which spread throughout the body.
Fentanyl and its analogues like 4-fluoroiso-butyrfentanyl are known to cause high levels of respiratory depression. Respiratory depression is a feature even at very low relative doses. This produces a sensation of slower breathing. At higher doses one may feel short of breath and will have an abnormal breathing pattern. At high doses loss of consciousness due to slow breathing is a real risk. This can result in irreversible brain damage, coma and death.
Fentanyl and its derivatives are also known to be highly sedating compounds and even more sedating than other opiates. Even with moderate doses a feeling of overwhelming sedation and tiredness is reported.
Other physical side effects include suppression of appetite, increased sweating, difficulty urinating, decreased sex drive, constipation, suppression of cough, nausea, vomiting and low blood pressure.
Many deaths have been reported by opiate users aspirating their own vomit after passing out.
These compounds are known to be incredibly addictive. They are both psychologically and physically addictive. Withdrawal symptoms will manifest if a person decides to suddenly stop using. For this reason it is incredibly difficult to quit these drugs.