Fentanyl has a high risk for abuse and severe, possibly fatal, breathing problems. Do not use fentanyl lozenges unless you have been regularly taking moderate to large amounts of narcotic painmedication.
Formula: C22H28N2O
Bioavailability: 92% (transdermal); 89% (intranasal); 50% (buccal); 33% (ingestion)
Excretion: Mostly urinary (metabolites, <10% unchanged drug)
Melting point: 87.5 °C (189.5 °F)
License data: EU EMA: by INN
Metabolism: hepatic, primarily by CYP3A4
Duration of action: IV: 30–60 minutes
Fentanyl
Fentanyl, also spelled fentanil, is an opioid which is used as a pain medication and together with other medications for anesthesia. It has a rapid onset and effects generally last less than an hour or two. Wikipedia
Formula: C22H28N2O
Bioavailability: 92% (transdermal); 89% (intranasal); 50% (buccal); 33% (ingestion)
Excretion: Mostly urinary (metabolites, <10% unchanged drug)
Melting point: 87.5 °C (189.5 °F)
License data: EU EMA: by INN
Metabolism: hepatic, primarily by CYP3A4
Duration of action: IV: 30–60 minutes
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