U-47700, also known as U4, pink heroin, pinky, and pink, is an opioid analgesic drug developed by a team at Upjohn in the 1970s [1] which has around 7.5 times the potency of morphine in animal models. [2][3][4]

U-47700, also known as “Pink”, "Pinky", or “U4” on the streets, is a potent, synthetic opioid medication developed as a dangerous designer drug. Even small doses can be very toxic or even deadly. Reports have surfaced of multiple deaths due to street use of U-47700 or "Pink".

The evidence demonstrates that U-47700 is a potent μ-opioid receptor agonist, which poses a serious risk for overdosing and death. However, most analogs of U-47700 appear to be less potent and have been detected infrequently in forensic specimens.

2016年11月10日 · WASHINGTON - Responding to the imminent threat to public health and safety, the U.S. Drug Enforcement (DEA) has placed U-47700 into Schedule I of the Controlled Substances Act, effective on November 14th.

2020年7月8日 · With potent in vivo activity, ∼10-times greater than that of morphine, U-47700 has become a drug of widespread abuse due to its ease of synthesis and, until recently, lack of robust detection methods by law enforcement. U-47700 has been found in counterfeit oxycodone tablets and is a key ingredient in “gray death.”

2020年11月23日 · The evidence demonstrates that U-47700 is a potent μ-opioid receptor agonist, which poses a serious risk for overdosing and death. However, most analogs of U-47700 appear to be less potent and have been detected infrequently in forensic specimens.

2025年3月18日 · U-47700, nicknamed “U4,” “pink,” or “pinky,” is a highly potent synthetic opioid that looks like a white or light pink powder. A lot of times, it is often either sold in baggies or …

2017年6月20日 · 国家禁毒办昨天（19日）上午举行新闻发布会，宣布将U-47700等四种物质列入非药用类麻醉药品和精神药品管制品种增补目录，目前我国列管的“新精神活性物质”已达138种。 今年3月发布的《2016年中国毒品形势报告》指出，在全国现有的250.5万名吸毒人员中，合成毒品滥用规模居首位、新精神活性物质国内滥用增多，毒品滥用结构发生根本变化。 “新精神活性物质”在中国已经存在滥用人群，主要是在娱乐场所滥用。 那么，“新精神活性物质”和传统毒品相 …

2018年1月1日 · U-47700 was developed by the Upjohn Co. in the 1970s as part of their search for a selective μ-opioid agonist with similar potency as morphine. U-47700 has re-emerged recently in the illicit drug market and is easily and cheaply obtained via the internet as well as on the street, many times falsely sold as another drug.

2020年12月2日 · U-47700, 3,4-dichloro-<i>N</i>- ( (1<i>R</i>,2<i>R</i>)-2- (dimethylamino)cyclohexyl)-<i>N</i>-methyl benzamide, is a novel synthetic opioid (NSO), discovered by the Upjohn company in the late 1970s. With potent <i>in vivo</i> activity, ∼10-times greater than that of morphine, U-47700 has become a drug …