Nearly 22,000 pounds of fentanyl were seized at US borders during the 2024 fiscal year, according to data from the US Customs and Border Protection. Mexican cartels then rely on established routes for drug trafficking that have been in place for a long time, often through legal ports of entry using US citizens that are recruited as mules. Now, there is no evidence that legal fentanyl is being diverted to the black market. At first, the illicit supply would also ship directly from China to the US, but it’s evolved into disparate streams. Fentanyl is relatively cheap to make, and its high potency means that supply can stretch far, making it an attractive option in the illicit market.

Some fentanyl precursors, such as the piperidones (after October 2023) have been banned under its Precursor Control Regulations, which have been in place at least since November 2016. Distributors of Abstral are required to implement an FDA-approved risk evaluation and mitigation strategy (REMS) program. In the US, fentanyl is a Schedule II controlled substance per the Controlled Substances Act. Effective from 1 May 2019, China officially classified all forms of fentanyl as controlled narcotics. Fentanyl citrate entered medical use as a general anesthetic in 1968, manufactured by McNeil Laboratories under the brand name Sublimaze. It was developed by screening chemicals similar to pethidine (Demerol) for opioid activity.
Older Black Men Are Disproportionately Affected By The Overdose Crisis
Following the patch, a flavored lollipop of fentanyl citrate mixed with inert fillers was introduced in 1998 under the brand name Actiq, becoming the first quick-acting formation of fentanyl for use with chronic breakthrough pain. After a set of successful clinical trials, Duragesic fentanyl patches were introduced into medical practice. Fentanyl and fentanyl analogues can be qualitatively detected in drug samples using commercially available fentanyl testing strips or spot reagents. Using formaldehyde and sulfuric acid, the solution will turn purple when introduced to opium drugs. It attenuates "second pain" with primary effects on slow-conducting, unmyelinated C-fibers and is less effective on neuropathic pain and "first pain" signals through small, myelinated A-fibers. When fentanyl binds, downstream signaling leads to inhibitory effects, such as decreased cAMP production, decreased calcium ion influx, and increased potassium efflux.
White House Steers $39B To Transitional Housing, Mental Health, SUD Treatment
The Elliptic Investigator graphs shown above underscore these capabilities – allowing any associations between dark web markets or vendors with fentanyl suppliers to be unearthed with ease. Regardless of how vendors try to conceal their fentanyl listings on the dark web, their activities can nevertheless be exposed through blockchain analytics. The second implication is how these risks are assessed and uncovered. Though this is dwarfed by the direct export trade – which exceeds $32 million in crypto – there nevertheless remains some key implications for countering the trade in fentanyl.
Fentanyl: What It Is, Uses, Side Effects & Drug Interactions

Thus, consumers may unknowingly ingest fentanyl, increasing the risk of overdose and death. Illegal fentanyl is potent and deadly, and other drugs are often laced with it. An injection of naloxone can reverse the effects of the drug if given soon enough. Fentanyl is a synthetic opioid used to treat severe pain. Overdose rates were higher in areas with more opioid-treatment programs than average, a finding that the study’s authors said demonstrated other barriers to access for some people. Disparities in access to treatment are driving up overdose rates among Black and Native American people, the CDC has said.