4-Methoxybutyrfentanyl (also known as 4-MeO-BF) is an opioid analgesic that is an analog of butyrfentanyl and has been sold online as a designer drug. == Side effects == Side effects of fentanyl analogs are similar to those of fentanyl itself, which include itching, nausea and potentially serious respiratory depression, which can be life-threatening.
4-Methoxybutyrfentanyl (also known as 4-MeO-BF) is an opioid analgesic that is an analog of butyrfentanyl and has been sold online as a designer drug. == Side effects == Side effects of fentanyl analogs are similar to those of fentanyl itself, which include itching, nausea and potentially serious respiratory depression, which can be life-threatening.
Source: Wikipedia "4-Methoxybutyrfentanyl" · CC BY-SA 4.0
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