Ketamine Vapes: What Is Actually in Them

Most vape pens sold as ketamine almost certainly do not contain ketamine. The reason is not conspiracy, it is temperature. Ketamine hydrochloride, the salt form that street powder comes as, does not vaporize well in a device built for nicotine e-liquid, so something else is doing the work.

That something is usually an analog with thinner safety data, dissolved in a solvent nobody has disclosed, delivered at a dose nobody has calibrated.

The chemistry does not cooperate

Ketamine can be inhaled. A 2017 Anesthesiology pharmacokinetics study established inhaled esketamine as a viable route with measurable bioavailability, using a nebulizer that produces fine aqueous droplets sized for lung absorption.

A vape pen is a different machine. It heats a liquid until it aerosolizes. Ketamine HCl melts at roughly 252 to 254°C and boils around 364°C, while standard vape coils run at 200 to 250°C. At that temperature ketamine HCl does not vaporize cleanly. It partly degrades, and whatever does come off is inconsistent puff to puff.

Ketamine freebase vaporizes lower and could work in a formulation, but converting HCl to freebase takes actual chemistry. An informally sold pen has almost certainly not been through it.

So if you inhale a “ketamine vape” and feel unmistakably dissociated, that feeling probably did not come from ketamine.

What is more likely inside

2-Fluorodeschloroketamine (2-FDCK) is the analog turning up most often in seizures and toxicology. A 2020 Hong Kong forensic study documented 20 analytically confirmed exposures in a single seven-month window. Nineteen of the 20 samples also contained at least one other ketamine-type analog, and 90% contained real ketamine as well, so people were getting a mixture rather than a clean substitute. A 2024 review of Hong Kong seizures found 2-FDCK physically indistinguishable from ketamine and routinely sold as ketamine or as an “enhanced” version of it. A 2024 forensic case series in the Journal of Analytical Toxicology reports two deaths and one case of drug-induced self-mutilation.

Deschloroketamine (DCK) is more potent by weight than ketamine and lasts longer. Forensic method-development work has identified it in blood and hair from toxicology casework, including a suicide involving several dissociative NPS at once. Higher potency per milligram matters enormously in a device where the dose per puff was never calibrated in the first place.

Methoxetamine (MXE) was the first widely used ketamine substitute, sold as the legal, bladder-friendly alternative. A 2016 review of case reports documented psychosis, cerebellar toxicity with uncoordinated movement lasting days, and fatal intoxications. A 2012 European Journal of Clinical Pharmacology series found emergency presentations with elevated heart rate and blood pressure, a sympathomimetic picture that is not typical of ketamine. MXE is controlled in many countries now, and whether 2-FDCK or DCK has taken its place depends on where you are.

Or nothing identifiable. Even for ordinary powder, a meaningful share of samples sold as ketamine are not ketamine: an international cryptomarket testing service found average purity of 71%, and a 2021 Italian festival drug checking study confirmed only 78% of ketamine-labelled samples as ketamine by GC/MS. A vape with no pharmaceutical provenance and no third-party testing has no verified contents at all.

Your lungs are the part nobody talks about

The 2019 and 2020 EVALI outbreak settled this question. The New England Journal of Medicine’s final Illinois and Wisconsin report found 87% of cases involved THC vape products from informal sources. Its companion paper identified vitamin E acetate, used as an oil diluent in illicit THC cartridges, in the lung fluid of 94% of EVALI patients and in zero of 99 controls.

The lesson was never that THC is uniquely dangerous to vape. It is that inhaling any liquid of unknown composition from an unverified source can injure your lungs severely. The carriers, diluents and cutting agents are the hazard, and they are exactly what an unlabeled product will never tell you. A novel dissociative dissolved in an undisclosed solvent and heated in an unregulated coil is an inhalation exposure with no safety data behind it at all, for any of the compounds involved.

Reagents cannot solve this one

This is the honest limitation, and it matters more than any product recommendation.

Marquis and Mecke may give you a reaction consistent with a dissociative, but they cannot separate ketamine from 2-FDCK, DCK or MXE. The structures are too close for colorimetry to resolve, and a vape liquid formulation makes it worse. A reagent kit is genuinely useful for MDMA and for psilocybin questions. It is not the tool for this problem, and we are not going to pretend otherwise.

FTIR or GC/MS spectrometry is the only thing that answers this question. Some harm reduction organisations and festival drug checking services run those instruments, and a 2019 study of drug checking at Canadian music festivals found meaningful gaps between what people believed they had and what spectrometry confirmed. If on-site checking exists where you are going, that is the option that actually works.

Where that leaves you

A vape pen from an unverified source is an unknown dissociative in an unknown solvent at an uncontrolled dose by inhalation. That combination strips out nearly every tool that makes dissociative use manageable: knowing the substance, measuring the dose, recognising the timeline.

If you are going to use ketamine, intranasal or oral from a known source with a weighed dose is a substantially better position to be in than an unlabeled pen. Our ketamine harm reduction guide covers dose ranges, the k-hole, and bladder risk. For combinations, see ketamine and alcohol and the interaction checker.

If you cannot find out what is in it, you cannot make a decision about it. That is the whole post.

Sources

• Pharmacokinetics and bioavailability of inhaled esketamine in healthy volunteers. Anesthesiology, 2017. PMID 28759464
• Emergence of 2-fluorodeschloroketamine: toxicology and urinary analysis in a cluster of cases. Forensic Science International, 2020. PMID 32460225
• Fluorodeschloroketamine found as a street drug in drug seizures and drug driving cases in Hong Kong. Forensic Science International, 2024. PMID 38850618
• 2-Fluorodeschloroketamine consumption: about two deaths and a case of self-mutilation. Journal of Analytical Toxicology, 2024. PMID 38619360
• Method development for methoxpropamine, 2-fluoro-deschloroketamine and deschloroketamine. Forensic Science International, 2021. PMID 33971504
• Methoxetamine, a novel psychoactive substance with serious adverse pharmacological effects: a review of case reports. Behavioural Pharmacology, 2016. PMID 27128862
• Acute toxicity associated with recreational use of the ketamine derivative methoxetamine. European Journal of Clinical Pharmacology, 2012. PMID 22205276
• Results of an international drug testing service for cryptomarket users. International Journal of Drug Policy, 2016. PMID 27239011
• Drug checking as a harm reduction strategy in recreational contexts: evaluation of two analysis methods. Frontiers in Psychiatry, 2021. PMID 33692707
• Pulmonary illness related to e-cigarette use in Illinois and Wisconsin, final report. New England Journal of Medicine, 2020. PMID 31491072
• Vitamin E acetate in bronchoalveolar-lavage fluid associated with EVALI. New England Journal of Medicine, 2020. PMID 31860793
• Drug checking services at music festivals and events in a Canadian setting. Drug and Alcohol Dependence, 2019. PMID 31605958
• A psychonaut’s experience of intoxication with multiple classes of drugs including novel psychoactive substances. Journal of Psychoactive Drugs, 2022. PMID 34842064