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4-Fluorobutyrfentanyl4-Fluorobutyrfentanyl also goes by the names 4-FBF, p-FBF and p-Fluorobutyryl fentanyl. It is a powerful drug of the opioid class. Other members of this class of drug compounds include oxycodone, morphine and heroin.

4-Fluorobutyrfentanyl is many times more powerful and more potent than what are considered to be the traditional opioid drugs like morphine and heroin. Online reports indicate that fentanyl analogue drugs like 4-Fluorobutyrfentanyl produce a euphoric high that is less intense than morphine and heroin.

The side effects of fentanyl analogues are similar to those of fentanyl itself. The side effects of 4-Fluorobutyrfentanyl include itching, nausea, vomiting, constricted pupils, slurred speech, reduced appetite and reduced libido. The most severe and deadly side effect of these drugs, including 4-Fluorobutyrfentanyl, is that they cause heavy respiratory depression.

Fentanyl analogues have killed hundreds of people throughout Europe, especially in the former Soviet Republics. In the early 2000s there was a surge in use of fentanyl analogues in Estonia, which lead to many deaths by overdose.

A dose of pure 4-Fluorobutyrfentanyl equivalent to a few grains of salt, may be enough to kill. To be used safely, fentanyl analogues must be heavily diluted to produce a solution of acceptable strength. Due to their ability to readily absorb through living membranes, it is even possible to overdose through skin contact with a partially dilute drug solution.

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It is easy to see how this combination of minute active dose and the side effect of heavy respiratory depression produce a toxic combination. Compounds like 4-Fluorobutyrfentanyl make far from ideal recreational drugs.

Despite this, 4-Fluorobutyrfentanyl has been sold online as a designer drug. It became classified as a hazardous substance in Sweden in August of 2015. In October 2015, China made 4-Fluorobutyrfentanyl a controlled substance.

Unverifiable online reports lead us to believe that 4-Fluorobutyrfentanyl has many similar effects to other fentanyl analogues.

Users report that tolerance to the drug grows at an alarming rate with repeated use. A dose that once provided a euphoric high will soon no longer do so. Users find themselves upping the dose in a reckless manner. With increased dose comes an increased risk of fatal respiratory suppression.

In the event that an individual loses consciousness due to overdose, they should be placed on their side in the recovery position, with their head pointed towards the ground. This means that if they vomit it will be cleared from the mouth and not enter in to the respiratory tract. Emergency services should then be contacted. If available, the drug naloxone can be used here as an anti-dote. It will reverse the effects of 4-Fluorobutyrfentanyl in the case of overdose, and potentially save a person’s life. If you are addicted to opioid drugs, find out from your local health service or drug treatment facility if you can get access to a naloxone prescription.

4-Fluorobutyrfentanyl is physically addictive. Like other opioid drugs, once an individual stops using they must undergo a harsh withdrawal period. After withdrawal, your tolerance to the drug will be much lower. Relapse after recovery is particularly dangerous, and individuals ought to be highly cautious with dosage if they find themselves in this situation.