Fentanyl and its salts are white granular or crystalline powders. Pharmaceutical formulations occur as solutions of fentanyl citrate for injection and in transdermal patches, as well as transmucosal lozenges.
Fentanyl , Fentanyl is a narcotic analgesic with potency at least 80 times that of morphine. Fentanyl and its derivatives (Alfentanil, Sufentanil, Remifentanil and Carfentanil) are used as anaesthetics and analgesics in both human and veterinary medicine (Carfentanil).Fentanyl
They are subject to international control as are a range of highly potent non-pharmaceutical fentanyl (NPF) derivatives, such as 3-methylfentanyl, synthesised illicitly and sold as ‘synthetic heroin’, or mixed with heroin.