How a gray-market substance gets banned, and what happens next

Three times in twenty-five years the United States has banned a substance that was being sold openly in shops, and each time the sequence was the same. Coverage described a new menace. A death or an attack gave it a name and a face. An agency or a legislature acted under emergency powers, citing numbers that were moving as they were cited. Then a different chemical appeared on the same shelf. This page walks the three documented cycles, GHB, the synthetic cannabinoids sold as Spice and K2, and the substituted cathinones sold as bath salts, and ends with the one under way now. It gives the claim with its date and the record with its date, and lets the gap between them stand.

GHB, 1990 to 2002

Gamma-hydroxybutyrate was sold in health-food stores at the end of the 1980s. The first federal action followed an outbreak of poisonings in 1990. The CDC counted fifty-seven cases across nine states and wrote: “Although no deaths have been reported, most patients have required emergency room care; at least 11 were hospitalized, and nine required ventilator support or other intensive care.”[1] The same report records the trigger: “On November 8, FDA issued an advisory warning that GHB use outside of FDA-approved physician-supervised protocols was unsafe and illicit and should stop”.[1]

The named incidents came later. Hillory Farias, a seventeen-year-old from La Porte, Texas, died in August 1996. The Harris County chief medical examiner, Joye Carter, told a House subcommittee in 1998 how the ruling came about: “The diagnosis working at that point had been a sudden death due to an accidental hemorrhage in the brain.”[2] Then: “It took us 2 months to detect this chemical.”[2] And on the result: “The blood level was low, by our forensic standards, but we must take into consideration the half-life of GHB is as little as 1 hour.”[2] The ruling was homicide by GHB toxicity, and the family's account of a drink spiked at a club became the case for a federal law.[2]

Samantha Reid, fifteen, died in Michigan in January 1999 after four young men put GHB in drinks at a party. The Michigan Supreme Court's statement of facts records that two girls fell ill, that Reid died, and that “the other slipped into a coma but eventually recovered”.[3] On the charges: “Defendants Brayman, Holtschlag, and Cole were convicted of involuntary manslaughter and two counts” of mixing a harmful substance in a drink.[3] There was no sexual assault charge.[3] CBS News nonetheless headlined its trial coverage “Date Rape Murder Case Goes To Court” and called it what was believed to be the “first date rape murder trial in the country is taking place in Detroit”.[4] The Baltimore Sun, that spring, wrote that the drug “has been used as a date rape drug in other states, though officials have received no reports of people taking it unwittingly in Maryland”.[5]

The numbers moved while Congress used them. At a March 1999 hearing the DEA's witness gave the agency's count: “Medical examiners have reported 32 fatalities since 1995 in which GHB was detected, and in many of those deaths GHB was used in combination with alcohol.”[6] On sexual assault: “In regard to sexual assault cases, DEA is aware of at least 13 sexual assault cases involving 22 victims under the influence of GHB.”[6] At the same hearing the bill's sponsor, Representative Sheila Jackson-Lee, said “GHB is known to be responsible for as many as 19 deaths and innumerable rapes throughout this country.”[6] The subcommittee chairman, Fred Upton, said of the phrase date rape that it “is in many cases a misnomer”.[6] Seven months later, on the House floor, the sponsor's count had doubled: the drug “has been used in innumerable rapes around the country and has been implicated in at least 40 deaths”.[7] By March 2000 the DEA's rule said “DEA has also documented 65 GHB-related deaths.”[8] One day later CBS relayed the agency's figure as fifty-eight: “It has been linked to at least 58 deaths since 1990 and more than 5,700 recorded overdoses, according to the Drug Enforcement Administration.”[9]

The law was signed on February 18, 2000. Its findings declare that “Abuse of illicit GHB is an imminent hazard to public safety that requires immediate regulatory action under the Controlled Substances Act (21 U.S.C. 801 et seq.).”[10] The same findings carve out a medicine: “A human pharmaceutical formulation of gamma hydroxybutyric acid is being developed as a treatment for cataplexy, a serious and debilitating disease.”[10] The DEA's implementing rule explains the split: an approved product “shall be a Schedule III controlled substance except that it will be subject to the criminal sanctions applicable to a Schedule I controlled substance”.[8] The agency added that “Public Law 106-172 directs DEA to publish this final rule and DEA has no discretion in this matter.”[8] The medicine arrived in 2002. The FDA announced that “Xyrem has been designated as a Schedule III Controlled Substance for medical use” and that “Illicit use of Xyrem will be subject to penalties under Schedule I, the most restrictive schedule of the Controlled Substances Act.”[11]

The successors had arrived before the law did. The statute's own findings name them: “If taken for human consumption, common industrial chemicals such as gamma butyrolactone and 1.4-butanediol are swiftly converted by the body into GHB.”[10] In January 1999 the FDA listed the GBL products on sale, “Renewtrient, Revivarant or Revivarant G, Blue Nitro or Blue Nitro Vitality, GH Revitalizer, Gamma G, and Remforce”, and said that “Although labeled as dietary supplements, these products are illegally marketed unapproved new drugs.”[12] Four months later the agency reported the next substitution: “Health authorities believe manufacturers are renaming their products and substituting 1,4 butanediol for GBL.”[13] The DEA's rule on GBL said the same thing in regulatory language: “GBL and 1,4-butanediol are structurally and pharmacologically similar to GHB and are often substituted for GHB.”[14] A 2001 paper in the New England Journal of Medicine put the cause and effect in one sentence: “After reports of toxic effects of gamma-hydroxybutyrate and its resultant regulation by the federal government, 1,4-butanediol and gamma-butyrolactone, another precursor of gamma-hydroxybutyrate and an industrial solvent, began to be marketed as dietary supplements.”[15]

The correction to the date-rape framing came from forensic laboratories, quietly. A 1999 study of urine from people who reported being assaulted found this: “Over a 26-month period, 1179 samples were collected and analyzed from 49 states, Puerto Rico, and the District of Columbia.”[16] Of those, “451 were positive for ethanol, 218 for cannabinoids, 97 for benzoylecgonine, 97 for benzodiazepines, 51 for amphetamines, 48 for GHB”.[16] A 2001 analysis of 3,303 samples concluded that the data “does not support the contention that any single drug, apart from alcohol, can be particularly identified as a 'date rape' drug.”[17] A 2010 systematic review of every study to that date found “GHB was detected in 0.2-4.4% of reported sexual assaults.”[18] Its authors wrote: “Our results do not support the widespread labelling of GHB as a date rape drug as the prevalence of GHB is much lower than of other substances used in sexual assaults.”[18] The law still carries the words Date-Rape Drug in its title.[10]

Spice and K2, 2008 to 2014

Herbal blends sold as incense were identified as carrying synthetic cannabinoids in Germany in December 2008. The EU drugs agency recorded that “On 16 December 2008, through a self-report study and chemical analysis of plant extracts and plasma samples after consumption, a team of German scientists (Auwärter et al., 2009) clearly identified the presence of added synthetic compounds.”[19] The same 2009 paper predicted what would happen to a ban: “Nevertheless, the sheer number of potentially psychoactive synthetic cannabinoids means that control measures targeting individual chemicals can easily be circumnavigated.”[19]

The DEA's November 2010 notice said “the first appearance of these synthetic cannabinoids in the United States occurred in November 2008” and that the poison centres' association “has reported receiving over 1,500 calls as of September 27, 2010”.[20] Its potency claim was bounded: the compounds “have been found to be more potent than THC in animal studies”.[20] The press claim was not. A month before, the US Army's news site had written of the products that “It is known to be between 100 to 800 times more powerful than marijuana.”[21] That multiple belongs to HU-210, a compound a 2012 review notes was rarely in the products at all: “However, HU-210 is difficult to synthesize.”[22]

The named incident was David Rozga, eighteen, of Indianola, Iowa, who shot himself in June 2010 after smoking K2. Senator Chuck Grassley named his bill for him and gave the basis for the attribution on the Senate floor: “The Indianola police believe David was under the influence of K2 at the time of his death.”[23] No source located for this page states that a toxicology test for the compounds was performed. In April 2011 Grassley listed other cases, among them “a 19-year-old man in Texas died, possibly from heart failure due to K2 use”.[24] That was Dominique Tate of Dallas. Seven months later a Dallas television station reported the autopsy: “But an autopsy didn't find any traces of K2 in her son, only traces of marijuana.”[25] It added: “Experts don't know if K2 caused Dominique's death or even contributed to it.”[25] The correction appeared in one local story whose headline still linked K2 to heart attacks.[25] In Georgia, a law was signed in 2012 named for a sixteen-year-old whose cause of death was unsettled when the governor announced it. PolitiFact noted “Toxicology tests are still in the works.”[26] Of another death counted in the state's case for the law, it wrote: “Two chemicals used in synthetic marijuana were found in the system of a man, 43, who died Sept. 8 in Cherokee County. The official cause of death was chronic high blood pressure.”[26]

The poison-centre count for 2010 exists in three versions, each attributed to the same association.

Figure for 2010	Who reported it	When
2,874[27]	Associated Press	April 2011
2,915[28]	the association's own blog	October 2011
2,906[29]	White House drug policy office	December 2012

The Associated Press gave the first, in a piece datelined from the Rozga home: nearly 1,300 calls so far in 2011 “compared with 2,874 calls for all of last year”.[27] The association itself wrote that “During 2010, they received 2,915 calls about these new products.”[28] The White House office reported that “2,906 calls relating to human exposure to synthetic marijuana were received in 2010”.[29] Poison-centre counts are revised as cases close, and the revisions were never reconciled in anything Congress cited.[28]

The five compounds became Schedule I by emergency order with “Effective Date: March 1, 2011.”[30] Permanent law followed on July 9, 2012, as a rider to the FDA user-fee bill, and it tried to close the substitution door with a class definition. A cannabimimetic agent “means any substance that is a cannabinoid receptor type 1 (CB1 receptor) agonist as demonstrated by binding studies and functional assays within any of the following structural classes”.[31] Ten months later the DEA had to act again, on compounds the class did not reach: “UR-144, XLR11 and AKB48 were not included among the 15 specific named synthetic cannabinoids, and do not fall under the definition of cannabimimetic agents, under FDASIA.”[32] Eight months after that, four more, one of which had no history at all: “Reports of ADB-PINACA were not found in the scientific literature prior to its emergence on the designer drug market.”[33] The CDC, reporting a kidney-injury cluster from a compound unknown in products before 2012, wrote: “Given the rapidity with which new SC compounds enter the marketplace and their increasing use in the past 3 years, outbreaks of unexpected toxicity associated with their use are likely to increase.”[34] A 2012 review described the mechanism without euphemism: after the first bans “there has been an emergence of new derivatives like JWH-081, JWH-122, JWH-210, and AM-2201, presumably in an attempt to continue to avoid regulations”.[22] Four years after the statute, Rozga's father testified again, and the local station summarised the hearing: “The Senate committee acknowledged that when the government bans a new synthetic drug, traffickers seem to just tweak the drug to get around the law.”[35]

Bath salts, 2010 to 2015

The cathinone cycle ran faster and its numbers are better documented, because the poison centres published them as they changed.

Year	Count as first published	Count as later revised
2010	302, May 2011[36]	304, by July 2012[37]
2011	6,130 as cited by a Senate sponsor, June 2012[38]	6,138[39]
2012	1,000 for the first four months, as cited by the same sponsor[38]	2,656 for the year[40]

The first year's count was “Poison centers took 302 calls in 2010 about the products”.[36] The peer-reviewed literature carried the revised pair, “increased dramatically from 304 in 2010 to 6,138 in 2011”.[37] The association's own alert page said “In 2011, poison centers took 6,138 calls about exposures to bath salts.”[39] Senator Amy Klobuchar's office, pressing for the federal ban in June 2012, gave a third set: “they received 300 calls for bath salts in 2010, 6,130 calls in 2011 and 1000 calls for the first four months of 2012”.[38] A thousand calls in four months is a pace of about three thousand for the year, less than half the year before. The same alert page, a year later: “In 2012, poison centers took 2,656 calls about exposures to bath salts.”[40] On the Senate floor that month the volume was described as “skyrocketing cases of calls and visits resulting from synthetic drug use”.[41]

Louisiana moved first, on January 6, 2011. The Associated Press reported that “A half-dozen dangerous chemicals sold as fake bath salts and plant food have been outlawed by emergency order in Louisiana, where anyone convicted of selling them will face penalties equivalent to those for selling heroin, Gov. Bobby Jindal announced Thursday.”[42] The named case was Dickie Sanders, whose “death has been ruled a suicide, and tests did find the drug in his body”.[42] The DEA followed in September with a notice that defined the class in one sentence: “Synthetic cathinones are designer drugs of the phenethylamine class which are structurally and pharmacologically similar to amphetamine, 3,4-methylenedioxymethamphetamine (MDMA), cathinone and other related substances.”[43] Three compounds, mephedrone, methylone and MDPV, became Schedule I by order: “This Final Order is effective on October 21, 2011.”[44]

Then Miami. On the evening of May 26, 2012, Rudy Eugene attacked Ronald Poppo on the MacArthur Causeway and was shot dead by a police officer. That night CBS Miami reported that “The head of the Miami Fraternal Order of Police, Armando Aguilar, said drugs are at the root of the attack.”[45] His drug was not bath salts. He said: “We have seen, already, three or four cases that are exactly like this where some people have admitted taking LSD and it's no different than cocaine psychosis”.[45] Two days later, on May 28, the same station reported that “Armando Aguilar believes the entire incident is the fault of a new drug trend that has led to similar incidents”, and the drug was now bath salts.[46] On May 29 CBS News carried it nationally, sourced to one person: “according to Armando Aguilar, the president of the Fraternal Order of Police, reports CBS Miami”.[47] ABC News the same day acknowledged that police had not connected Eugene to the drug “but experts say he was exhibiting the classic signs of someone high on the drug”.[48] On May 31 Reason observed that “it bears emphasizing that there are no toxicological results yet”.[49]

Congress used the case before the results existed. On June 20, Representative Charlie Dent told the House: “This legislation is especially timely given the recent reports of inhuman and psychotic acts committed by individuals high on bath salts.”[50] His next sentence: “Last month, we all heard the horrifying story of a Miami man who stripped naked, assaulted another individual, and chewed his face off before being shot dead by the police.”[50] On June 25, Senator Grassley told the Senate: “Just a few weeks ago a man in Miami, Florida attacked a homeless man and ate nearly half his face before police had to shoot him to stop him.”[41] He paired it with a second case: “Two weeks ago, police in upstate New York tazered a woman who was choking her 3-year-old son after smoking bath salts.”[41] Twelve days earlier, the local station covering that death had reported that “An autopsy was unable to pinpoint the exact cause of death, according to police.”[51] It added: “It could take several weeks before toxicology results are back.”[51] No completed result for that case was located for this page.

The toxicology came on June 27, 2012. The Miami Herald reported that afternoon that Eugene “had no drugs in his system other than marijuana”, citing the Miami-Dade Medical Examiner's office.[52] The office's statement, as carried by the Associated Press: “The laboratory has tested for but not detected any other street drugs, alcohol or prescription drugs, or any adulterants found in street drugs.”[53] The AP continued: “The department also ruled out common drugs found in the street drugs called bath salts, which authorities had initially speculated were the cause of the brutal attack on Ronald Poppo.”[53] CNN quoted the office on the second laboratory: “The department has also sought the assistance of an outside forensic toxicology reference laboratory, which has confirmed the absence of ‘bath salts,’ synthetic marijuana and LSD”.[54] The office's finding was bounded, in its own words, to results “within the limits of current technology by both laboratories”.[52] The AP's wording of the bound: “The department ruled out the most common components found in bath salts, which mimic the effects of cocaine or methamphetamine and have been associated with bizarre crimes in recent months.”[55] The Miami New Times gave the count: “MDPV, the active ingredient in many forms of bath salts, was not found.”[56] And: “Five other chemicals commonly found in bath salts were also absent.”[56] The medical examiner's own press release is not online at any county address this page could find, so these are the newspapers' quotations of it, and they agree with each other sentence for sentence.

The correction ran on the same day across the AP, CNN, CBS, NBC and Fox.[53][54][55] It did not displace the claim. Within twelve days the result was being reframed as a limit of the test. A toxicologist told the Sun Sentinel that “The most advanced lab can only test for 17 of the 100-plus chemical compounds that are used to make synthetic marijuana”.[57] That statistic is about synthetic cannabinoids, not cathinones.[57] The federal statute was signed twelve days after the toxicology, on July 9, 2012.[31] The AP had already noted, in its correction story, that “The attack sparked a statewide crackdown on synthetic drugs and bath salts, with many South Florida counties and cities moving forward with ordinances to ban and restrict their sale.”[53] In December 2014 the Miami New Times was still writing that “The only problem is that bath salts were never found in” Eugene's body at autopsy.[58] By then the attribution had changed sides. In a 2014 Miami murder case the defence argued the victim had been on bath salts, and the same medical examiner's office “found no Alpha-PVP, the substance found in the pills, in Alfonso's her blood or urine”.[59] A 2016 content analysis of broadcast coverage of the attack, as summarised by Reason, found this: “They found 31 stories: 24 from CNN, three from ABC, two from NBC and one each from NPR and MSNBC.”[60] Of those, “eight stories used the term epidemic”.[60] Nobody appears to have counted the corrections, so this page does not claim they were fewer. It claims what is documented: the correction was carried, and the belief persisted anyway.

The statute of July 2012 named two cathinones, mephedrone and MDPV, and did not name methylone.[31] Methylone was made permanent by rule in April 2013, and that rule contains a sentence about the other two: “HHS did not provide a scientific and medical evaluation and scheduling recommendation regarding mephedrone and MDPV.”[61] The compounds Congress scheduled permanently were the ones that never received the scientific review the statute otherwise requires.

That matters because the three were not one kind of drug. A 2013 paper from Basel put it directly: “Cathinones have considerable pharmacological differences that form the basis of their suggested classification into three groups.”[62] MDPV and its parent, pyrovalerone, “were highly potent and selective DA and NA transporter inhibitors but unlike amphetamines did not evoke the release of monoamines.”[62] Mephedrone and methylone, by contrast, “also induced the release of 5-HT, similar to 3,4-methylenedioxymethamphetamine (MDMA, ecstasy) and other entactogens.”[62] A NIDA laboratory had already shown, in rat brain tissue, that “mephedrone and methylone are nonselective substrates for plasma membrane monoamine transporters, similar to MDMA in potency and selectivity.”[63] In animals they were “weak motor stimulants when compared with methamphetamine.”[63] The same laboratory's characterisation of MDPV found the opposite kind of drug: “Our data show that MDPV is a monoamine transporter blocker with increased potency and selectivity for catecholamines when compared with cocaine.”[64] Specifically, “When compared with cocaine, MDPV is 50-times and 10-times more potent as an uptake blocker at DAT and NET, respectively”.[64] That paper was published online in October 2012, three months after the statute scheduled the compound permanently.[64] A 2014 review states the distinction in one sentence: “Mephedrone and methylone act as transporter substrates, stimulating presynaptic monoamine release and blocking reuptake from the synaptic cleft, whereas MDPV functions as a monoamine reuptake blocker with no apparent effect upon release.”[65] The same review notes that “Few, if any, preclinical or clinical studies evaluating the pharmacology, toxicology or physiologic effects of synthetic cathinones had been performed prior to their widespread abuse.”[65] So a releaser that resembles MDMA, a releaser that resembles MDMA with a methylenedioxy ring, and a reuptake blocker fifty times more potent than cocaine at the dopamine transporter were scheduled as a single thing called bath salts, which was a label on a packet. A toxicology review published in late 2011 named one cause of the products' spread: “Their dramatic increase has resulted in part from sensationalized media attention as well as widespread availability on the Internet.”[66] It also recorded the state of the death evidence at the moment the DEA acted: “Deaths from use of MDPV and other synthetic cathinones have not been well documented or reported in the medical literature at this time.”[66]

The successor was alpha-PVP, a pyrovalerone like MDPV, sold as flakka. The DEA scheduled ten more cathinones by order with “This final order is effective March 7, 2014.”[67] Its casework count for 2010 to 2013 “registered 9,113 reports containing these synthetic cathinones”, and alpha-PVP alone accounted for 4,536 of them.[67] The agency's own page on synthetic drugs describes what the bans did to the retail trade: “More recently, the cathinone market has been pushed underground”.[68] Flakka killed in Broward County, Florida, “from which 61 people in Broward County died between September 2014 and mid-December 2015”.[69] What ended it, according to the county officials who dealt with it, was not domestic scheduling but “working with the DEA to pressure the Chinese government, which last fall made it illegal to produce it and 115 other synthetic substances”.[69]

The cycle now under way is 7-hydroxymitragynine, a kratom alkaloid sold in concentrated tablets and shots. The kratom plant itself had its own numbers first. In November 2017 the FDA said “The FDA is aware of reports of 36 deaths associated with the use of kratom-containing products.”[70] In February 2018 the count was “we now have 44 reported deaths associated with the use of kratom”, in a statement that also said “Overall, many of the cases received could not be fully assessed because of limited information provided”.[71] The CDC's review of overdose deaths across 27 states found that “152 (0.56%) of these decedents tested positive for kratom on postmortem toxicology”.[72] Of those: “Kratom was determined to be a cause of death (i.e., kratom-involved) by a medical examiner or coroner for 91 (59.9%) of the 152 kratom-positive decedents, including seven for whom kratom was the only substance to test positive on postmortem toxicology, although the presence of additional substances cannot be ruled out”.[72] In Colorado, investigators re-examined fifteen deaths on the state's certificates. “Four deaths were reported to involve mitragynine only, and coroners attributed each to mitragynine toxicity.”[73] After re-testing, “we determined that 14 deaths clearly involved multiple drugs”.[73]

The DEA's notice of intent on 7-OH of July 2026 carries the death counts for the alkaloid, and it carries its own qualifiers. From the FDA's adverse-event database: “To date, 9 cases within the FAERS database have resulted in death.”[74] From the agency's toxicology programme, 85 cases since 2019: “Of these, 55 were fatal and 30 were non-fatal cases.”[74] The next sentence: “Samples often contained other related alkaloids (mitragynine and mitragynine pseudoindoxyl) or other drug classes, such as opioids (e.g. fentanyl), benzodiazepines (e.g. bromazolam), and ketamine.”[74] The notice said the order “will not be issued before August 5, 2026”.[74] As of October 5, 2026, no order has been published.[75] The label attached to this cycle is a phrase borrowed from the last one. The FDA used ‘gas station heroin’ in 2025 for tianeptine, a drug named that way “because of its availability in gas station stores, is not approved by the FDA for any use”, and which “In some countries, tianeptine is licensed and marketed as an atypical antidepressant.”[76] When the Health Secretary announced the 7-OH action two months later he reached for the same shelf: “But now you can go to any gas station”.[77] An antidepressant and an indole alkaloid share no pharmacology. They share a retailer.

References

1. Epidemiologic Notes and Reports: Multistate Outbreak of Poisonings Associated with Illicit Use of Gamma Hydroxy Butyrate — CDC, Morbidity and Mortality Weekly Report 39(47), 1990-11-30 (Wayback Machine copy)
2. Controlled and Uncontrolled Substances Used to Commit Date Rape, hearing before the House Judiciary Subcommittee on Crime, 1998-07-30 — US House of Representatives, Serial No. 62-309 (Wayback Machine copy)
3. People v Holtschlag, Cole, Brayman and Limmer, Michigan Supreme Court, 2004-07-23 — Michigan Supreme Court
4. Date Rape Murder Case Goes To Court — CBS News, 2000-02-10
5. 'Club drug' Blue Nitro making appearances throughout Maryland — The Baltimore Sun, 1999-04-12
6. Date Rape Drugs, hearing before the House Commerce Subcommittee on Oversight and Investigations, 1999-03-11 — US House of Representatives, Serial No. 106-7, via govinfo
7. Congressional Record, House, consideration of H.R. 2130, 1999-10-12 — US Government Publishing Office, bound Congressional Record vol. 145 pt. 17
8. Schedules of Controlled Substances: Addition of Gamma-Hydroxybutyric Acid to Schedule I (final rule, 65 FR 13235) — Drug Enforcement Administration, Federal Register, 2000-03-13, via govinfo
9. 3 Teens Guilty In Date-Rape Case — CBS News, 2000-03-14
10. Public Law 106-172, Hillory J. Farias and Samantha Reid Date-Rape Drug Prohibition Act of 2000 — US Government Publishing Office, enacted 2000-02-18
11. FDA Approves Xyrem for Cataplexy Attacks in Patients with Narcolepsy (Talk Paper T02-31) — US Food and Drug Administration, 2002-07-17 (Wayback Machine copy)
12. FDA Warns About Products Containing Gamma Butyrolactone or GBL and Asks Companies to Issue a Recall (Talk Paper T99-5) — US Food and Drug Administration, 1999-01-21 (Wayback Machine copy)
13. FDA Warns About GBL-Related Products (Talk Paper T99-21) — US Food and Drug Administration, 1999-05-11 (Wayback Machine copy)
14. Placement of Gamma-Butyrolactone in List I of the Controlled Substances Act (final rule, 65 FR 21645) — Drug Enforcement Administration, Federal Register, 2000-04-24, via govinfo
15. Adverse events, including death, associated with the use of 1,4-butanediol — New England Journal of Medicine 344(2), 2001-01-11, abstract via PubMed
16. Prevalence of drugs used in cases of alleged sexual assault — Journal of Analytical Toxicology 23(3), 1999, abstract via PubMed
17. Forensic urinalysis of drug use in cases of alleged sexual assault — Journal of Clinical Forensic Medicine 8(4), 2001, abstract via PubMed
18. The involvement of gamma-hydroxybutyrate in reported sexual assaults: a systematic review — Journal of Psychopharmacology 24(9), 2010, abstract via PubMed
19. Understanding the 'Spice' phenomenon — European Monitoring Centre for Drugs and Drug Addiction, thematic paper, 2009 (Irish Health Research Board mirror)
20. Schedules of Controlled Substances: Temporary Placement of Five Synthetic Cannabinoids Into Schedule I (notice of intent, 75 FR 71635) — Drug Enforcement Administration, Federal Register, 2010-11-24
21. Spice: the other marijuana — US Army, army.mil, 2010-10-29 (Wayback Machine copy)
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23. Grassley Introduces Bill to Ban the Chemicals Used in Synthetic Drugs (with floor statement on the David Mitchell Rozga Act) — Office of Senator Chuck Grassley, 2011-03-17
24. Q & A: Banning the Harmful Drug K2 — Office of Senator Chuck Grassley, 2011-04-01
25. Area Doctor Prepares Study Linking K2 With Teen Heart Attacks — CBS DFW, 2011-11-09
26. Fact-check of Governor Nathan Deal on synthetic marijuana — PolitiFact Georgia, 2012-04-09 (Wayback Machine copy)
27. AP IMPACT: Synthetic drugs send thousands to ER — Associated Press via Deseret News, 2011-04-06
28. Synthetic Drugs – Dangerous and Deadly — American Association of Poison Control Centers blog, 2011-10-26
29. Synthetic Drugs (fact sheet) — Office of National Drug Control Policy, 2012-12-06
30. Schedules of Controlled Substances: Temporary Placement of Five Synthetic Cannabinoids Into Schedule I (final order, 76 FR 11075) — Drug Enforcement Administration, Federal Register, 2011-03-01
31. Public Law 112-144, Food and Drug Administration Safety and Innovation Act, Title XI Subtitle D, Synthetic Drug Abuse Prevention Act of 2012 — US Government Publishing Office, approved 2012-07-09
32. Schedules of Controlled Substances: Temporary Placement of Three Synthetic Cannabinoids Into Schedule I (final order, 78 FR 28735) — Drug Enforcement Administration, Federal Register, 2013-05-16
33. Schedules of Controlled Substances: Temporary Placement of Four Synthetic Cannabinoids Into Schedule I (notice of intent, 79 FR 1776) — Drug Enforcement Administration, Federal Register, 2014-01-10
34. Acute Kidney Injury Associated with Synthetic Cannabinoid Use, Multiple States, 2012 — CDC, Morbidity and Mortality Weekly Report 62(6), 2013-02-15, via PubMed Central
35. Iowa father of K2 victim pushes for more action — KCRG-TV9, 2016-06-07
36. U.S. Poison Centers Raise Alarm about Toxic Substance Marketed as Bath Salts; States Begin Taking Action — American Association of Poison Control Centers, 2011-05-12 (Wayback Machine copy)
37. Synthetic Cathinones (Bath Salts): Legal and Health Care Challenges — Addiction Science and Clinical Practice, 2012, via PubMed Central
38. Klobuchar Calls on Congressional Leaders to Include Bipartisan Provisions Banning Dangerous Synthetic Drugs in Final FDA Legislation — Office of Senator Amy Klobuchar, 2012-06-08
39. Bath Salts (alert page) — American Association of Poison Control Centers, as captured 2012-11-16 (Wayback Machine copy)
40. Bath Salts (alert page) — American Association of Poison Control Centers, as captured 2013-05-11 (Wayback Machine copy)
41. Congressional Record, Senate, Senator Chuck Grassley on the Food and Drug Administration Safety and Innovation Act, 2012-06-25 — US Government Publishing Office, Congressional Record vol. 158 no. 96, S4449
42. Drugs sold as bath salts now illegal in Louisiana — NBC News / Associated Press, 2011-01-06
43. Schedules of Controlled Substances: Temporary Placement of Three Synthetic Cathinones Into Schedule I (notice of intent, 76 FR 55616) — Drug Enforcement Administration, Federal Register, 2011-09-08
44. Schedules of Controlled Substances: Temporary Placement of Three Synthetic Cathinones Into Schedule I (final order, 76 FR 65371) — Drug Enforcement Administration, Federal Register, 2011-10-21
45. Miami Police Confrontation With Men Leaves 1 Dead, 1 Hurt — CBS Miami, 2012-05-26
46. Causeway Cannibal Identified; Fears Grow Over Drug Possibly Involved — CBS Miami, 2012-05-28
47. Rudy Eugene, Fla. 'face-chewing' naked man, may have been high on bath salts, cop union president says — CBS News, 2012-05-29
48. Face-Eating Attack Possibly Prompted by 'Bath Salts,' Authorities Suspect — ABC News, 2012-05-29
49. Voodoo Pharmacology Literalized: The Drug That Turns People Into Flesh-Eating Zombies — Reason, Jacob Sullum, 2012-05-31
50. Congressional Record, House, Representative Charlie Dent on the Food and Drug Administration Safety and Innovation Act, 2012-06-20 — US Government Publishing Office, Congressional Record vol. 158 no. 94, H3825
51. Munnsville woman allegedly high on 'bath salts' dies after attacking child — CNY Central, 2012-06-13
52. No bath salts detected: Causeway attacker Rudy Eugene had only pot in his system — Miami Herald, 2012-06-27 (Wayback Machine copy)
53. Marijuana found in face-chewer's body, but no other drugs, medical examiner says — NBC News / Associated Press, 2012-06-27
54. Tests in cannibalism case: Zombie-like attacker used pot, not 'bath salts' — CNN, 2012-06-27
55. Medical examiner rules out bath salts in Miami face-chewing attack — Fox News / Associated Press, 2012-06-27
56. Experts Say Pot Didn't Trigger Miami Zombie Attack and Bath Salts May Yet Be to Blame — Miami New Times, 2012-06-28
57. Toxicology Experts Question Claim That Miami Face-Chewer Was Not on Bath Salts: Report — NBC 6 South Florida, 2012-07-09
58. Bath Salts Didn't Cause the Miami Cannibal Attack, Scientists Say — Miami New Times, 2014-12-02
59. ME Finds Victim In 'Facebook Murder' Not On Bath Salts — CBS Miami, 2014-05-01
60. The Zombie Drug That Wasn't — Reason, Jacob Sullum, 2016-05-09, reporting Swalve and DeFoster, Contemporary Drug Problems 43(2)
61. Schedules of Controlled Substances: Placement of Methylone Into Schedule I (final rule, 78 FR 21818) — Drug Enforcement Administration, Federal Register, 2013-04-12
62. Pharmacological characterization of designer cathinones in vitro — British Journal of Pharmacology 168(2), 2013, via PubMed Central
63. The Designer Methcathinone Analogs, Mephedrone and Methylone, are Substrates for Monoamine Transporters in Brain Tissue — Neuropsychopharmacology 37(5), 2012, via PubMed Central
64. Powerful Cocaine-Like Actions of 3,4-Methylenedioxypyrovalerone (MDPV), a Principal Constituent of Psychoactive 'Bath Salts' Products — Neuropsychopharmacology 38(4), 2013, published online 2012-10-17, via PubMed Central
65. Bath salts and synthetic cathinones: An emerging designer drug phenomenon — Life Sciences 97(1), 2014, via PubMed Central
66. The Toxicology of Bath Salts: A Review of Synthetic Cathinones — Journal of Medical Toxicology 8(1), published online 2011-11-23, via PubMed Central
67. Schedules of Controlled Substances: Temporary Placement of 10 Synthetic Cathinones Into Schedule I (final order, 79 FR 12938) — Drug Enforcement Administration, Federal Register, 2014-03-07
68. About Synthetic Drugs — DEA Diversion Control Division, undated page, read 2026-10-05
69. Synthetic Drugs Send States Scrambling — Stateline, Pew Charitable Trusts, 2016-04-29 (Wayback Machine copy)
70. Statement from FDA Commissioner Scott Gottlieb, M.D., on FDA advisory about deadly risks associated with kratom — US Food and Drug Administration, 2017-11-14 (Wayback Machine copy)
71. Statement from FDA Commissioner Scott Gottlieb, M.D., on the agency's scientific evidence on the presence of opioid compounds in kratom, underscoring its potential for abuse — US Food and Drug Administration, 2018-02-06 (Wayback Machine copy)
72. Notes from the Field: Unintentional Drug Overdose Deaths with Kratom Detected, 27 States, July 2016 to December 2017 — CDC, Morbidity and Mortality Weekly Report 68(14), 2019-04-12 (Wayback Machine copy)
73. Deaths in Colorado Attributed to Kratom — New England Journal of Medicine 380(1), 2019-01-03, author manuscript via PubMed Central
74. Schedules of Controlled Substance: Temporary Placement of 7-Hydroxymitragynine Above a Specified Threshold in Schedule I (notice of intent, 91 FR 40917) — Drug Enforcement Administration, Federal Register, 2026-07-06
75. Federal Register search: documents containing the term 7-hydroxymitragynine — Office of the Federal Register, queried 2026-10-05
76. New “Gas Station Heroin” Tianeptine Product Trend (letter to health care professionals) — US Food and Drug Administration, 2025-05-08
77. Feds launch crackdown on kratom byproduct — Axios, 2025-07-29 (Wayback Machine copy)