What chemsex is (and why it isn't just drug use)

When men first come to talk with me about chemsex, one of the things that often strikes me is how much of the available information they have already read. They know the risks. They have usually been told, in clinical settings or by well-meaning friends, that what they are doing is dangerous. What they have not usually encountered is an honest account of what chemsex actually is, including the parts that are not dangerous, and why those parts matter just as much to understanding the full picture.

It is not the same as recreational drug use that happens to include sex.

Chemsex is the use of specific drugs during planned sexual activity, primarily among gay, bisexual, and other men who have sex with men. It is not the same as recreational drug use that happens to include sex. It is not the same as general substance misuse. And it sits badly within most addiction frameworks, because it is embedded in a specific cultural context, serves specific social and psychological functions, and involves substances that interact with sex in distinctive ways.

Understanding those distinctions is not an academic exercise. It is the starting point for any help that is actually going to be useful.

The drugs involved

Three substances sit at the centre of chemsex in the UK.

Crystal methamphetamine is a powerful stimulant. It dramatically elevates energy, arousal and confidence over an extended period, removes the need for sleep, and suppresses inhibition in a way that feels, at least initially, like liberation. For men who have spent years managing anxiety or shame in sexual spaces, the experience of simply not feeling those things can be genuinely extraordinary. The same properties that make it compelling make it dangerous: the neurological impact of sustained use, including the risk of psychosis with heavy or prolonged use, is real and serious.

Mephedrone produces intense euphoria and heightened libido, but its effects wear off significantly faster than methamphetamine. That brevity is part of what drives the redosing patterns typical of chemsex: the peak fades quickly, the pull to take more is strong, and across a session men may administer it several times, each dose adding to the cumulative physical and psychological load.

GHB and GBL work differently again. At lower doses they produce powerful social ease, disinhibition and heightened sensory experience, often described as removing barriers to connection in a way that feels different from alcohol. The serious problem is that the margin between a dose that works and a dose that is dangerous is narrower than with almost any other recreational substance. Small variations in dose, changes in tolerance, or the presence of other substances can push someone from the desired effect to loss of consciousness or respiratory depression. GHB and GBL are the substances most commonly implicated in chemsex overdoses in the UK; London emergency departments see related admissions every week.

These substances are often used in combination, which multiplies both the intensity of the experience and the risk of harm.

The settings

Chemsex happens across several overlapping settings. One-to-one or small group encounters arranged through apps are common. Chillouts, small home gatherings that often develop organically from an initial encounter and can run across a weekend, are a significant part of the chemsex circuit. Larger invitation-only parties sit at the more organised end of the spectrum.

The boundaries between these settings are fluid. A man might arrive expecting a one-to-one encounter and find himself in the early stages of something much longer. Over time, a man can find himself embedded in a social world almost entirely organised around chemsex, with the drugs and the sex becoming the infrastructure through which his whole social life is mediated.

Why it is not just drug use

This is the part that most clinical writing gets wrong, or skips over entirely.

Chemsex is understood, in most of the literature, primarily through the lens of risk. Those risks are real and important. But the risk lens alone tells you almost nothing about why men engage in chemsex, why they continue when they can see the risks clearly, or what would actually need to be different for them to stop.

What we hear consistently from the men we work with is something the risk literature almost never mentions: that chemsex gave them access to something that felt genuinely important and genuinely unavailable through other routes.

Conversations at chillouts that ranged across identity, politics and the particular texture of being a gay man, conversations that only seemed possible with the social ease that certain substances produced. The sense of being accepted and desired by other gay men in a space where the usual hierarchies of the scene felt suspended. The experience of being fully sexual, openly and without apology, in a community of men who understood exactly what that was.

Working with men who have disabilities and found that chemsex spaces were among the only sexual spaces where they were treated as fully desirable. With trans men who found an acceptance there that the broader gay scene routinely denied them. With men from minority ethnic backgrounds who found an acceptance there that they did not always find elsewhere on the gay scene. None of this is to romanticise these spaces. Violations happen in them. Harm occurs in them. But dismissing the genuine experience of belonging and connection that chemsex can provide means you will never understand why men find it so hard to leave.

The community function

For many gay and bisexual men, chemsex spaces serve a social purpose that goes well beyond sex. They are places where it is possible to be openly sexual, to have conversations that are not possible elsewhere, to feel part of a network of men who share something of your experience. In that sense chemsex does what community is supposed to do: it provides belonging, connection and recognition.

The problem is that community built on that foundation is fragile. The connection that feels so real in the context of drug use can feel entirely inaccessible once the drugs have worn off. Attempts to build something that lasts beyond the session often fail, because the conditions that made the connection feel easy do not exist in ordinary life. This can leave men feeling, in the aftermath of a chemsex session, more lonely than they felt before it, which drives them back toward the only context in which that loneliness reliably lifts.

Chemsex begins as a solution to loneliness and a lack of community, and ends, for many men, by deepening both.

That is the cruel irony, and it is genuinely cruel. Chemsex begins as a solution to loneliness and a lack of community, and ends, for many men, by deepening both. The connections it builds cannot hold. The belonging it creates cannot survive outside the conditions that produced it. And the longer a man's social world is organised primarily around chemsex, the harder it is to imagine replacing it with anything else.

How this shapes the work

If you understand chemsex purely as drug misuse, you will try to remove the drug use. You may succeed in the short term. But you will have removed the only access the man has had to community, belonging and a sense of being desired and connected. Without addressing those underlying needs, the change will not hold.

The work we do starts from a different place: by acknowledging honestly what chemsex has given. By asking not just what it is costing, but what it has been doing, what the man has been looking for in it, and what would need to be available elsewhere for the function it has served to be replaced.

More of what that looks like in practice is covered in our main guide, Chemsex: what it is and how to recover, and in the article on the loop itself, The chemsex loop: shame, escalation, apps and chillouts. For men thinking about applying to the programme, the application page gives details of what is involved and how to get started.