Educational content. This article does not provide dosing, sourcing or buying information. In an emergency call 112 (EU), 999 (UK) or 911 (US).
Dissociative designer drugs are chemical relatives of ketamine and phencyclidine (PCP). Most belong to the arylcyclohexylamine family, which includes 2F-DCK (2-fluorodeschloroketamine), DCK (deschloroketamine), 3-MeO-PCP, 3-HO-PCP, 3-MeO-PCE, 3-HO-PCE, 3-Me-PCP, 3-Me-PCE, O-PCE, HXE, DMXE, MXPr and MXiPr. Related compounds such as MXP (methoxphenidine) come from a different chemical family but act in a similar way. Many appeared after methoxetamine (MXE) was banned across Europe following a risk assessment that linked it to deaths and serious poisonings.
How they affect the body
These drugs block NMDA receptors in the brain, which interrupts signals between the senses, memory and conscious awareness. That produces the “dissociated” feeling of detachment from the body and surroundings. Some, especially the PCP-type compounds, also act on other brain systems, which can add stimulant-like and unpredictable effects.
Common side effects
- Confusion, disorientation and difficulty speaking
- Numbness and loss of coordination; inability to move normally
- Nausea and vomiting
- Rapid eye movements, blurred vision
- Raised heart rate and blood pressure
- Anxiety, panic and frightening hallucinations
- Memory gaps
Why dissociatives are dangerous
Accidents and injuries
Because dissociatives dull pain and disconnect people from their surroundings, users may not notice injuries, cold or danger. Falls, burns, drowning in baths or open water, and road accidents are well-documented causes of harm.
Severe mental effects
PCP-type compounds such as 3-MeO-PCP have been linked to agitation, aggression, psychosis, catatonia and self-harm during intoxication. These effects can last for hours and are hard to predict. A published case report and literature review on 3-MeO-PCP describes intoxications with high blood pressure, rapid heart rate, altered consciousness and agitation, and French toxicologists have reported deaths involving the drug.
Deaths and poisonings
Fatal intoxications have been reported with several of these substances, including a case involving 2F-DCK and 3-MeO-PCE together. Because new analogues appear faster than they can be studied, doctors often have little information to go on when treating poisonings.
Mixing with depressants
Combining dissociatives with alcohol, benzodiazepines, GHB or opioids greatly increases the risk of vomiting while unconscious, breathing problems and death.
Bladder and long-term damage
Regular ketamine use is well known to cause ketamine-related uropathy: painful, frequent urination, blood in the urine and, in severe cases, permanent bladder damage. Close analogues such as DCK and 2F-DCK have not been studied long term, but there is no reason to assume they are safer. Memory and concentration problems and psychological dependence are also reported with regular dissociative use.
Warning signs of an emergency
- Unresponsive, or breathing slowly or irregularly
- Vomiting while very drowsy (choking risk)
- Seizures
- Extreme agitation, violence or signs of psychosis
- Chest pain or very high blood pressure symptoms such as severe headache
Call emergency services, keep the person in a safe, quiet place, use the recovery position if they are drowsy, and stay with them. Tell responders what may have been taken.
Legal status
Methoxetamine and many related arylcyclohexylamines are controlled internationally or nationally; the UK controls a wide range of them under a generic definition in the Misuse of Drugs Act, and its Psychoactive Substances Act covers others. Ketamine itself is a controlled medicine in most countries. Selling these drugs as “research chemicals” does not make them legal.
Where to get help
- Emergency: 112 (EU), 999 (UK), 911 (US).
- Netherlands: Drugs Infolijn (drugsinfo.nl); anonymous drug testing via DIMS.
- UK: FRANK (talktofrank.com).
- US: SAMHSA National Helpline, 1-800-662-4357.
- See a doctor promptly about any urinary pain, urgency or blood in the urine after dissociative use.
Frequently asked questions
Is 2F-DCK the same as ketamine?
No. It is a chemical analogue that has never been tested as a medicine. Its effects, duration and risks are less well understood than ketamine’s.
Can these drugs damage the bladder?
Ketamine can, with regular use. Similar damage from close analogues is plausible but has not been well studied.
What is a “K-hole”?
A slang term for a state of deep dissociation where a person may be unable to move or communicate. It leaves them highly vulnerable to accidents, choking and assault.
This article is for general information and does not replace medical advice.
