David Stuart



What is chemsex?

If your understanding of the term “chemsex” has been informed by the general media, you’d be forgiven for thinking it defines the use of drugs or alcohol for sex, by any population. 
However it has a more precise, and culturally specific definition.

Chemsex is the use of any combination of drugs that includes crystal methamphetamine, mephedrone (and other cathenones) and/or GHB/GBL – specifically for the purposes of gay sex. It is syndemically associated with some recent and dramatic changes that affected the experience of gay sex and pleasure:

  • new technologies/online gay hook-up culture (not exclusive of sauna/bathhouse culture);
  • the impact HIV/AIDS has had on the experience of gay sex and pleasure; and
  • changes in laws and societal attitudes towards gay sex specifically (homosexuality generally).

Download a more comprehensive, academically published definition of the word "Chemsex" here.
"Chemsex: origins of the word, a history of the phenomenon and a respect to the culture" from Drugs & Alcohol Today, Emerald Publishing.

Chemsex is not simply a word that describes the use of alcohol or drugs during sex.

That is a very simple interpretation that mainstream media have either misunderstood, or misappropriated for exciting headlines.

Chemsex is a word that I first coined in 2001, in an attempt to to describe something that I saw happening within my own local gay communities and sexual networks; something that seemed very different to other kinds of drug use cultures that I was familiar with.

Chemsex is a word that defines a phenomenon unique to modern gay culture; it is uniquely and specifically associated with gay hook-up trends, and the gay cultural idiosyncrasies that have evolved as part of online gay hook-up cultures and the use of sex-Apps (HIV sero-sorting behaviours and other HIV related stigmas, camp-shaming/masc-shaming and inter-tribe identification and rejections). Chemsex is also about the disproportionate availability of recreational and particularly harmful drugs that have been introduced so widely to gay, bi and Queer men via online hook-up Apps (referred to as chems - crystal methamnphetamine, mephedrone and GHB/GBL). Chemsex, though sometimes simply about the pursuit of pleasure and enjoyment of homo-sex, is often also about the medicating of complex issues that inhibit the enjoyment of gay sex such as societal and internalised homophobia, the impact of the HIV/AIDS epidemic within gay cultures, and religious or cultural shame that is often associated with gay sex.

Chemsex defines this international phenomenon that is so disproportionately affecting gay communities in so many cities around the world, and resulting in an upsetting and disproportionate number of deaths, addictions, mental health issues and emergency hospital presentations.

Another slang term adopted by the same population, is "Slamming" (or "to slam"), which refers to the increasing use of intravenous needles to assimilate crystal methamphetamine and mephedrone. A glossary of further ChemSex-related terms can be found here.

"Chems"; drugs associated with ChemSex and their effects

Although drugs and alcohol have often been used in sexual contexts throughout history, crystal methamphetamine, mephedrone and GHB/GBL provide a particular sexually-disinhibiting “high”, which represents a different public health concern than that associated with other drugs more commonly used in the past. 

These three drugs have unfortunately become very common and readily available within gay “scenes” over the last decade, and their use has been accompanied by higher-risk sexual activity than has ever been observed or associated with any other kind of drug use. Users of these drugs can feel invulnerable to harm, supremely confident, dismissive of consequences, sexually adventurous, experience a heightened sense of pleasure, and can possess a stamina and endurance that may keep them awake for many days. When used in sexual contexts, this can translate into a reduced concern for safer sex practices and contact with a higher number of partners during a short, concentrated period of time. Unwanted side effects while under the influence can include aggression, paranoia, hallucinations/perceptions of persecution, overdose and more.

The role of geo-sexual networking Apps (eg, Grindr) in the rise of ChemSex

Geo-sexual networking apps have served a beneficial function in gay men’s lives in some ways, though there have also been some negative consequences. Sex for gay men is often associated with risk and danger; this is a consequence of an HIV epidemic that (in the UK) has particularly affected gay men. Many other gay men struggle with sex and intimacy having grown up struggling with a different sexual identity, cultural (or internalised) homophobia or a desire to fit in and avoid rejection. 

Apps were adopted very quickly by gay communities as a way to date and seek sex; yet communicating one’s sexual and emotional needs via the use of abbreviations, word counts and photo-shopped avatars can be very challenging for many people, and can often lead to unenjoyable sexual encounters. “Chems” have become a tool used by many to negotiate or overcome these challenges and are often commonly available via these technologies in some big cities that host large gay communities.

ChemSex prevalence

Global prevalence of ChemSex is not known, as it is a relatively new syndemic for researchers – many still struggle to define ChemSex, let alone quantify it. Anecdotal reports of varying concern have emerged from gay community organisations and sexual health services in the United States, Australia, Canada, Mexico, Australia, Asia and Europe. The UK, and in particular London, has had the most robust response to the trends, with 56 Dean Street becoming a global model for ChemSex support. There are enough reports and emerging data to prioritise ChemSex as a public health concern and to develop effective responses, and to do so, quickly, sensitively, and without moral judgments, even if robust evidence is lacking.  

NB; the pusuit of quantifying the percentage of any gay population engaging in ChemSex is unlikely to be the most productive use of resources, unlikely to even be accurately achievable, and the curiosity behind such a pursuit might possibly be more emotional than academic; gay community, gay identity, gay sexual politics have endured a crippling few decades, with fights for equal rights, the HIV epidemic, societal homophobia and sexual/moral/religious condemnation; many of us, consciously or otherwise, might be emotionally invested in the outcome of the ChemSex prevalence question. A certain outcome might tar the gay sex-positivity movement with a drug-using, promiscuous brush; another outcome might whitewash the devastation ChemSex has caused within smaller communities, or dilute the potency of community concern that this issue might deserve. Others fear, (and wish to control) the media backlash against gay hedonism that devastated the gay liberation movement in the 1980's AIDS era. Gay men are passionate about this subject, polarisingly so, and the passion is not always conscious. Sensitivity to this, and benign, objective research that can deliver useful data is the key.

Measuring ChemSex prevalence might better be focused within smaller, geographical populations where the outcomes can be used to implement public health/individual health responses.

The harms

The harms associated with ChemSex are many; GHB/GBL toxicity (overdose) is responsible for the death of 1 gay Londoner every month. Suicides born of Chem use (either comedown depressions, or drug-induced psychosis) fill our social media newsfeeds. The impacts on mental health, quality of life, relationships and communities are immeasurable. Poor sexual wellbeing, and damage to a person's concept of arousal, intimacy and relationships are evident. Sexual assaults while under the influence of drugs in sexually charged environments are common, and the very issue of consent to sex in relation to ChemSex is one that individuals and health services are grappling to understand & address. The infections (STIs, hepatitis C) that can occur within ChemSex environments equate to a public health concern. HIV is perhaps the most devastating to an individual, and costly to public health. Every city is different in regard to how much infectious HIV exists within its' sexually active (or injecting drug using) populations. London has a particularly high prevalence; 1 in every 8 gay men in London is HIV positive (2016), with approximately 20% of these unaware of their infection (and therefore infectious). It is a credible assumption that the prevalence of infectious HIV that exists within chem-using populations, is higher than this still.

The larger majority of gay men seeking ChemSex support are not seeking support with a drug problem or an "addiction" issue; mostly they are seeking resolution to the sexual health consequences of their drug use. Those presenting for help with the actual ChemSex behaviour, are identifying issues around seeking sex and relationships, struggling with online and App use behaviours, issues around HIV fear and stigma, struggling in their pursuit of connection and community, and many other gay cultural idiosyncrasies that impact their sex and romantic lives. 

For these men, it is not a drug problem, but a gay sex problem.

The best way to reduce the harms of ChemSex, is to develop a robust understanding of what we want our sex and romantic lives to be like, to set some goals and boundaries around that - and having the awareness and communication skills to pursue these goals/protect those boundaries. if we all enjoyed good sexual wellbeing, born of a cultural dialogue about the role sex and intimacy plays in our lives, then ChemSex related harms would be better avoided. It is important that sexual health clinics and gay community organisations provide services that go beyond simple testing and prescribing of medicine, which also support our patients and communities to develop good sexual and general wellbeing, including adapting to cultural changes that many may be struggling to adapt to.


 1. The increasing availability/use of sexually-disinhibiting drugs...

                2.  by a population of people that represent high HIV prevalence...

                         3. making use of technologies that facilitate easy pursuit of sexual partners... 

                                 4. exacerbated further by some complex gay-cultural uniquities...

does indeed equal a public health concern that deserves a non-alarmist, but proportionate response. It is also a concern that deserves our compassion for a vulnerable group of people that are struggling with cultural changes associated with sex and relationships, and will certainly not benefit from further stigma or judgment, despite the sensationalist potential of these behaviours.

Cultural appropriation


"Saying “Straight people do chemsex too”, is like screaming “White Lives matter too” to a group of Black people holding “Black Lives Matter” signs at a vigil for black children shot by police.
Saying “straight people do chemsex too” is like saying “straight white men get exploited too” to a group of women at a rally who are campaigning for gender equality.
A Trans person who is using meth to medicate sexual behaviour, is likely medicating issues unique to his/her/their culture; the experience of hating your genitals all through puberty, to point of suicide. The experience of being unwelcome in a gay sauna, so hiding in the dark room, having less than satisfactory sex, so as not to be discovered. The experience of a violent “straight” man in a dark Trans sex club having sex with you and ACTUALLY treating you like a women (which so few other lovers actually do..)… but slapping you and spitting at you after orgasm because he’s ashamed. Rather than holding your hand walking down the street… Trans people DESERVE drug use support tailored to those specific needs, unique to that culture, and it is a disservice to simply lump them under a chemsex umbrella label for convenience, simply because there isn’t a famous word that identifies that kind of drug use. It’s not chemsex, and it’s insulting and unfair to Trans people to call it that.

Chemsex and the pursuit of gay pleasure is killing a gay man each month in all the cities that host big gay communities around the world each month.
Recreational drug use by straight people on Tinder is not killing one straight person a year, in any city around the world.

Chemsex is a unique phenomenon affecting gay men and unique to gay hook-up culture. Saying straight people do chemsex is a reprehensible cultural appropriation that hurts and insults global gay communities trying to come to terms with something dangerous and phenomenal happening within their communities around the world, something uniquely about gay sex, something killing gay men. It’s important to remain vigilant about other groups of people who use drugs for sex - but including that under the umbrella of a Chemsex label, is lazy and offensive to gay men everywhere.

Straight people having sex on chems... is not Chemsex; it is simply straight people using chems for sex."

More ChemSex-specific resources, research, films & articles to be found here.

The above is the expert opinion of David Stuart