Slamming and injecting in chemsex: when to seek help

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There is a point in some men's chemsex journeys where the pattern crosses into territory where the physical risks are severe enough that they have to be named directly and urgently. That point, more often than not, involves slamming.

Slamming is the injection of chemsex drugs, most commonly crystal methamphetamine or mephedrone, sometimes both, directly into a vein. It is the highest-harm pattern within chemsex, and the one most likely to bring a man into clinical contact through an acute medical event rather than through a conversation he has chosen to have. This piece is about what slamming is, why men move toward it, what it risks, and how to get help.

Why men slam

It is easy to frame slamming as simply an escalation of irrationality, a man who has lost all judgment. That framing misses what is actually happening.

For most men, slamming is reached through the same escalatory logic that drives the rest of the chemsex loop. The intensity of experience produced by oral or nasal administration of crystal methamphetamine or mephedrone decreases with tolerance over time. Injecting a substance produces a substantially faster and more intense peak: the drug reaches the brain more quickly and at higher concentration than via other routes. For a man whose body has habituated to the oral or nasal dose, injection offers what is effectively a route back to the original experience.

That experience is genuinely compelling, and I think it is important to say that clearly. The logic is the same logic that underpins all escalation in compulsive patterns: the original behaviour stops delivering, and the escalation is what delivers again. The tragedy is that each escalation narrows the options available and raises the costs.

The threshold for slamming, once crossed, is difficult to un-cross.

The threshold for slamming, once crossed, is difficult to un-cross. The intensity of the injected experience sets a new benchmark, and oral or nasal use can feel deeply unsatisfying by comparison. Men often describe having intended to slam only once, and finding that every subsequent non-injected session feels like a lesser version of something they now know is possible.

What slamming risks

The risks associated with slamming fall into several distinct categories that compound each other.

The most immediate is overdose. Injectable doses are difficult to calibrate precisely, particularly when a man is already intoxicated from earlier in a session. Cardiac events, including dangerous arrhythmias and acute elevation of heart rate and blood pressure, are a specific risk with injected methamphetamine. Men who slam are often already several hours into a session and may be combining intravenous methamphetamine with GHB or GBL, which adds the risk of respiratory depression to the cardiac risk.

Blood-borne virus transmission is a major risk category. Sharing injecting equipment including needles, syringes and the water used to mix the solution transmits HIV and hepatitis C directly and efficiently. Studies from London clinics have found that among men engaged in injecting chemsex, hepatitis C transmission rates are substantially elevated. Re-infection rates among HIV-positive gay men engaged in injecting chemsex are a significant clinical concern, and UK specialist sexual health services have published guidance specifically because of this.

Sustained crystal methamphetamine use, particularly injected use, carries a serious risk of methamphetamine-induced psychosis: paranoid ideation, auditory or visual hallucinations, and a loss of contact with reality that can persist beyond the period of acute drug use. In some cases, particularly with very heavy or prolonged use, psychotic symptoms can recur even in the absence of current drug use. This is a medical emergency requiring urgent clinical assessment and specialist psychiatric input.

The secondary social harms are also worth naming. Injecting marks are visible in ways that other evidence of drug use may not be, and this can have sudden and serious consequences in professional and personal life. Even within the chemsex scene, a shift to injecting is often experienced by others as a line being crossed, and connections within the scene can thin out around a man who is slamming heavily.

GHB and GBL: a specific and serious risk

GHB and GBL deserve separate attention. They are not usually injected, but they are involved in the most dangerous moments within chemsex for a specific reason: the gap between a dose that produces the desired effect and a dose that causes serious harm is exceptionally narrow.

The same amount that works in one context may cause loss of consciousness in another, depending on tolerance, body weight, the time since the last dose, and whether other substances have also been taken. Combining G with alcohol dramatically increases the risk of respiratory depression and death.

The unconsciousness produced by a G overdose looks, to a bystander, like someone who has simply fallen asleep. This is one of the features that makes it particularly dangerous at chillouts and parties: men who have lost consciousness through G toxicity may not be identified as needing emergency help immediately, particularly if others in the space are also intoxicated.

Waiting to see if they wake up is not a safe response.

If someone becomes unresponsive in a chemsex context, place them in the recovery position and call 999 immediately. Waiting to see if they wake up is not a safe response. The window in which G overdose can progress from unconsciousness to respiratory arrest can be short.

When to seek help urgently

Some situations require urgent help rather than a conversation about psychological recovery.

Any chemsex-related medical emergency, including overdose, unresponsiveness, irregular breathing, severe chest pain, or psychotic symptoms that are severe and not subsiding, requires 999.

Men who are physically dependent on GHB or GBL, indicated by withdrawal symptoms including sweating, tremor, anxiety, confusion or seizures when the drug is stopped, need medical supervision of withdrawal. GHB and GBL withdrawal is one of a small number of drug withdrawal syndromes that can be physically dangerous. A GP or emergency department can initiate this process.

For men who have experienced psychotic symptoms related to methamphetamine use, a GP referral to mental health services or, if symptoms are acute, attendance at an emergency department, is the right first step.

Specialist NHS sexual health clinics in London have chemsex-specific support. Controlling Chemsex, and the Gay Men's Health Collective (GMHC) provide advice and support for Chems and Slamming specifically. FRANK, on 0300 123 6600, provides drug information and referral.

The psychological work alongside harm reduction

None of the above is a reason to defer the psychological work indefinitely. For many men, the psychological work is precisely what creates the conditions in which harm reduction becomes possible: understanding what the behaviour has been doing, building the internal resources to manage the states that drive it, developing a vision of a sexual life that does not require the drugs to function.

The programme is not a substitute for specialist medical and drug services. It is the next layer of work, addressing the psychological and relational dimensions of chemsex that the harm-reduction frame, on its own, rarely reaches.

For men who are currently slamming, the question of sequencing matters. If drug use is severe enough that it is affecting the capacity to think clearly between sessions or engage in any reflective way with the process, stabilisation with specialist drug services is the right first step. Once there is a degree of stability, the deeper psychological work becomes both possible and necessary. Abstinence as a prerequisite for starting has never been the position in this work, and my published research shows that men with active drug use can make meaningful change in the programme.

Our main guide, Chemsex: what it is and how to recover, sets out the clinical reasoning behind that position in more detail. The chemsex loop: shame, apps and chillouts describes the psychological pattern that slamming is embedded in. And Sober sex after chemsex: what to expect addresses what recovery, in the fullest sense, looks like from the other side.