Bath salts (also calledpsychoactive bath salts,PABS[1][2]) are a group ofrecreationaldesigner drugs.[3][4] The name derives from instances in which the drugs were disguised asbath salts.[5][6][7] The white powder, granules, orcrystals often resembleEpsom salts, but differ chemically. The drugs' packaging often states "not for human consumption" in an attempt to circumventdrug prohibition laws.[5] Additionally, they may be described as "plant food", "powdered cleaner", or other products.
Bath salts usually containcathinones, typicallymethylenedioxypyrovalerone (MDPV, also known as "monkey dust", although this term can refer toMDPHP as well[8]),methylone ormephedrone; however, thechemical composition varies widely[6][9] and products labeled with the same name may also contain derivatives ofpyrovalerone orpipradrol. In Europe the main synthetic cathinone is mephedrone, whereas in the US MDPV is more common.[6]
Pharmacologically, very little is known about how bath salts interact with the brain and how they aremetabolized by the body. Scientists are inclined to believe that bath salts have a powerful addictive potential and can increase users' tolerance.[7][10] They are similar to amphetamines in that they cause stimulant effects by increasing the concentration ofmonoamines such asdopamine,serotonin, andnorepinephrine insynapses.[7][11] They are generally less able to cross theblood brain barrier than amphetamines due to the presence of abeta-keto group that increases the compound'spolarity.[7]
Bath salts can be ingested orally,snorted,smoked,plugged orinjected. Bath salts can be detrimental to human health and can potentially cause erratic behavior, hallucinations, and delusions.[12] This is often due to their wakefulness-promoting effect, leading to insomnia.
Bath salts are often consumed concurrently withalcohol. A 2015 study[13] has investigated the interrelation betweenmephedrone and alcohol, focusing on psychostimulant and rewarding effects. It showed thatalcohol, at low (non-stimulant) doses, significantly enhances the psychostimulant effects of mephedrone. This effect is mediated by an increase in synapticdopamine, ashaloperidol, but notketanserin, was capable of blocking the potentiation by alcohol.[citation needed]
3-MMC has become a popular cathinone in recent years
Bath salts come in a powdered or crystallized form that can be swallowed, smoked, injected, or snorted. Subjective effects are similar to MDMA or cocaine[14] but with a duration of 5–6 hours. Both substances cause a rapid onset of action in the central nervous system,[15] and stimulant toxicity.
In larger doses this class of substances can cause effects similar to those seen in cases ofserotonin syndrome.[19] Due to their rapid onset, synthetic cathinones are powerful reward/reinforcers, with high addiction potential.[20] "Monkey dust", "bath salts" or "plant food" are often used at the same time as classical psychoactive drugs. Users who have overdosed often display symptoms ofagitation,delirium,hallucinations,seizures,tachycardia,hypertension orhyperthermia.[21]
Little is known about how many people use bath salts.[7] In the UK, mephedrone, commonly known as MCAT, is the fourth most commonly used illicit drug amongnightclub goers aftercannabis,MDMA andcocaine.[7] Based on reports to theAmerican Association of Poison Control Centers, use of bath salts in the US is thought to have increased significantly between 2010 and 2012.[7] The increase in use is thought to result from their widespread availability, undetectability on many drug tests, and sensationalist media coverage.[9]
User's age tends to range from 15 to 55, with the average age being 28.[17]
In theUnited Kingdom, allsubstituted cathinones were made illegal in April 2010,[26][27] under theMisuse of Drugs Act 1971, but other designer drugs such asnaphyrone appeared soon after[28] and some products described as legal contained illegal compounds.[29] To avoid being controlled by theMedicines Act, designer drugs such asmephedrone have been described as "bath salts", or other misnomers such as "plant food" despite the compounds having no history of being used for these purposes.[16][30][31]
In July 2012,US federal drug policy was amended to ban the drugs commonly found in bath salts.[32] Prior to that, bath salts were legal in at least 41 states.[33] Prior to the compounds being made illegal, mephedrone, methylone, and MDPV were marketed as bath salts.[34] The "bath salt" name and labels that say "not for human consumption" are an attempt to skirt theFederal Analogue Act, which forbids selling drugs that are substantially similar to drugs already classified for human use.[34][35][36]
Use of bath salts or monkey dust has spread through social media.[37] Anecdotal reports of the drug increasing its users' pain thresholds while simultaneously giving them increased strength can largely be attributed to the emergency services and frontline NHS staff. Such reports have been picked up, and sensationalised by the regional and tabloid press.[38][39] In 2018, in the cityStoke-on-Trent,[40] Monkey dust was reported to be an entirely new compound, when in fact preparations of MDPV and MDPHP or "bath salts" have been available since the early 2000s.[41] The print press and broadcast media have often used textual framing techniques to report on synthetic cathinone use among society's most vulnerable.[citation needed] Terms like "epidemic", "zombie attack" and more recently "incredible hulk" are often used when describing users.[42] In August 2018, Staffordshire police said they were receiving around ten calls per day regarding monkey dust. However, it was not clear whether the incidents actually involved monkey dust, or a combination of substances.[43]
Contrary to popular belief, during the investigation of the 2012Miami cannibal attack toxicologists found no trace of the components in bath salts during the autopsy of the attacker.[44][45]
Bath salts or monkey dust were originally aresearch chemical orlegal highs. Users would purchase the chemicals off the internet, ingest them and blog about the effects.[46]
Synthetic cathinones such asmephedrone, which are chemically similar to thecathinone naturally found in the plantCatha edulis (khat), were first synthesised in the 1920s.[7] They remained obscure until the first decade of the 21st century whenunderground chemists rediscovered them and began to use them in designer drugs, as the compounds were legal in many jurisdictions.[7][47] In 2009 and 2010 there was a significant rise in the use of synthetic cathinones, initially in theUnited Kingdom and the rest ofEurope, and subsequently in theUnited States. Drugs marketed as "bath salts" first came to the attention of authorities in the US in 2010 after reports were made to US poison centers.[6] In Europe, the drugs were predominantly purchased from websites, but in the US they were mainly sold in small independent stores such as gas stations andhead shops.[6] In the US, this often made them easier to obtain than cigarettes and alcohol.[6] Bath salts have also been sold online in small packets.[48]
Hundreds of other designer drugs or "legal highs" have been reported, including artificial chemicals such assynthetic cannabis and semi-synthetic substances such asmethylhexaneamine.[49] These drugs are primarily developed to avoid being controlled by laws against illegal drugs, thus giving them the labeldesigner drugs.[49]
In the US, the number of calls to poison centers concerning "bath salts" rose from 304 in 2010 to 6,138 in 2011, according to the American Association of Poison Control Centers.[48] Calls related to bath salts then began to decrease; by 2015, the number had declined to 522.[50]
^Gray, Bobbe Ann; Holland, Cindra (June 2014). "Implications of Psychoactive 'Bath Salts' Use During Pregnancy".Nursing for Women's Health.18 (3):220–30.doi:10.1111/1751-486X.12123.PMID24939199.
^abcdefSpiller HA, Ryan ML, Weston RG, Jansen J (2011). "Clinical experience with and analytical confirmation of "bath salts" and "legal highs" (synthetic cathinones) in the United States".Clinical Toxicology.49 (6):499–505.doi:10.3109/15563650.2011.590812.PMID21824061.S2CID33364692.
^abcdefghiCoppola M, Mondola R (2012). "Synthetic cathinones: Chemistry, pharmacology and toxicology of a new class of designer drugs of abuse marketed as "bath salts" or "plant food"".Toxicology Letters.211 (2):144–149.doi:10.1016/j.toxlet.2012.03.009.PMID22459606.
^abMiller, Michael C. (September 2011)."Ask the Doctor: Bath salts—a new way to get high?".Harvard Mental Health Letter. Archived fromthe original on 17 January 2021. Retrieved18 December 2013. Q. I heard a news story about people using bath salts to get high. How is that possible? My husband and I have two teenagers. Should we talk with them about this?
A. The "bath salts" you've heard about have nothing to do with the type that people add to water and use while soaking in a tub. These newer bath salts are designer drugs that circumvent the laws governing controlled or illegal substances, but can be used to get high.
The active chemicals in these salts—mephedrone, pyrovalerone, or methylenedioxypyrovalerone (MDPV)—all have stimulant properties. They are ...(contains additional text)
^Sivagnanam G. (3 February 2012). "News and Views: 'Drug abuse' of a different 'wave' length".Journal of Pharmacology and Pharmacotherapeutics.3 (1):85–86.doi:10.4103/0976-500x.92493 (inactive 11 July 2025).{{cite journal}}: CS1 maint: DOI inactive as of July 2025 (link)(contains additional text)
^Winder, G. S.; Stern, N.; Hosanagar, A. (March 2012). "Are "Bath Salts" the next generation of stimulant abuse?".J Subst Abuse Treat.44 (1):42–45.doi:10.1016/j.jsat.2012.02.003.PMID22445773.
^Rust KY, Baumgartner MR, Dally AM, Kraemer T (2012). "Prevalence of new psychoactive substances: A retrospective study in hair".Drug Testing and Analysis.4 (6):402–408.doi:10.1002/dta.1338.PMID22522922.
^"Synthetic Drug Threats". National Conference of State Legislatures. 28 November 2012. Archived fromthe original on 6 December 2020. Retrieved28 December 2013.
^Baumann, Michael H.; Bukhari, Mohammad O.; Lehner, Kurt R.; Anizan, Sebastien; Rice, Kenner C.; Concheiro, Marta; Huestis, Marilyn A. (2017).Neuropharmacology of 3,4-Methylenedioxypyrovalerone (MDPV), Its Metabolites, and Related Analogs. Current Topics in Behavioral Neurosciences. Vol. 32. pp. 93–117.doi:10.1007/7854_2016_53.ISBN978-3-319-52442-9.ISSN1866-3370.PMC5392131.PMID27830575.
^abMcElrath, K; O'Neill, C (March 2011). "Experiences with mephedrone pre- and post-legislative controls: perceptions of safety and sources of supply".The International Journal on Drug Policy.22 (2):120–7.doi:10.1016/j.drugpo.2010.11.001.PMID21242082.
^"Bath Salts". American Association of Poison Control Centers. Archived fromthe original on 19 January 2017. Retrieved18 January 2017.In 2012, poison centers took 2,697 calls about exposures to bath salts with the number reducing to 998 in 2013. In 2014, there were 587 exposure calls with the number reducing to 522 in 2015.