The Microdose Movement



The Ultimate Microdosing Guide to Ketamine

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Also Known As

Kitty, Special K, Kitty Kat, K


What it is: Ketamine is a medication used for maintaining anesthesia. It is typically snorted, though occasionally injected. It is a classical dissociative that was developed during the 1960’s along with PCP, MXE, and DXM. It was originally created to be a replacement to PCP for surgical anesthesia.

Ketamine (also known as ket, K, special K, kitty, and others) is a classical dissociative substance of the arylcyclohexylamine class. It is the most well-known and widely-used among the dissociatives, a diverse group that includes phencyclidine (PCP), methoxetamine (MXE), dextromethorphan (DXM), and nitrous oxide. Recently, it has become the subject of significant clinical research due to the discovery that it can rapidly relieve treatment-resistant depression and suicidal ideation.

Ketamine is considered to have moderate to high abuse potential. Chronic use is associated with escalating tolerance and psychological dependence. Additionally, the physical health effects of chronic use are not well-known. There is growing evidence that chronic use causes bladder and urinary tract dysfunction. Additionally, chronic use has been linked with cognitive impairment which may indicate neurotoxicity.

How It Works

It produces its main effects by binding to and blocking the NMDA receptor; however, its precise mechanism is poorly understood and the subject of ongoing research.

Ketamine acts as a non-competitive antagonist of the NMDA receptor, an ionotropic glutamate receptor. NMDA receptors allow for electrical signals to pass between neurons in the brain and spinal column; for the signals to pass, the receptor must be open. Dissociatives close the NMDA receptors by blocking them. This disconnection of neurons leads to loss of feeling, difficulty moving, and eventually the notorious state known as the “K-hole”.

The estimated bioavailability of rectal ketamine is about 25%, oral ketamine is about 17% while nasal ketamine is 45%.

How It Feels

Heavy sedation and body dissociation with spontaneous bodily sensations including tingling in the hands, feet, and head. Physical euphoria is common and can be accompanied by out of body experiences.

At low doses modified body perception encourages activity as it feels much easier and lighter for the body to move and can even lead to pain relief but can results in tactile suppression and clumsiness.

It can be extremely immersive, allowing the user to focus solely on one source of information alone. It can stimulate non-linear thinking and allow for enhanced creativity allowing for new insight through highly abstract thoughts.

Notable anxiety reduction, personal bias suppression.

How microdosing it feels: Some users report feeling a physical high and a decrease in physical sensation. “If you have pain in your knees,” says one user, “you’re not going to feel that on a microdose of ketamine.” It also eases stress and depression. With larger doses, users report that those anti-depressive effects can last for days, weeks, or even a month.


Tolerance to ketamine can build rapidly and lead to binge patterns of it use. Initial doses typically range from around 25mg to 100mg, with well experienced user reporting using up to 2,000 milligrams .

Many young individuals have taken to using ketamine as a reliable and re-creatable high, that brings a sense of tranquility and peace to ones environment, creating a rapid psychological dependence with any repeated use.

Dissociatives such as Ketamine are reported to be unique from other substances because they are capable of producing a long-term or permanent form of tolerance (“permatolerance”) that accumulates slowly and independently from normal tolerance. Many chronic ketamine users report that they need to consume substantially more to achieve dissociation or k-hole compared to their first use, even after taking extended breaks.

It is unknown why or how this occurs, although it has been suggested to be a potential indicator of some form of neurotoxicity. Dissociative permatolerance poses an additional problem considering ketamine’s negative effects on the urinary tract. As a result, heavy or chronic use of all dissociatives is strongly discouraged.


Frequent users of ketamine >20 days/month show increased measures of depression, impaired verbal and visual short term memory, It’s short term, recreational use dose not seem to posses any neurotoxic qualities that would lead to long term, negative neurological consequences.

The most common toxicity reported with frequent ketamine use or dependence is ketamine-induced ulcerative cystitis which includes frequent urges to urinate, incontinence, decrease bladder compliance, decrease bladder volume, and painful bloody urine. Keep in mind that this was reported in individuals who were all using more than 5 grams per day.

Fatal ketamine overdoses are rare. However, there is evidence that suggests extremely high doses may result in damage to the brain and other organs.

How To Microdose Ketamine

A mood enhancement effect has been noticed, particularly among sufferers of depression, with sub-perceptual doses of up to 0.2 mg/kg. However, ketamine is not considered safe for microdosing at the same rate as LSD or psilocybin, and needs to be spaced out but more than a few days at time.

Typical starting doses are recommeded to be 0.1mg/kg, meaning an average 62 kg adult would ingest around 6.2 mg of Ketamine for their initial dose. At 0.2m/kg this would be a 12.5 mg microdose.

Oral administration is typically not recommend as the full benefits will not be experienced by the end user and IV administration is typically reserved for clinical and therapeutic treatment regiments. That leaves insufflation AKA “snorting” as the last resort.

What You Need

  • Milligram or jewelry scale
  • Clean straw
  • Scissors
  • Wax paper

Preparation Instructions

  1. Calculate the dose based on your weight. I.e. 0.1mg x 62 kg (136 lbs) = 6.2mg
  2. Place a piece of wax paper on your milligram scale to weight the ketamine.
  3. Weight out the calculated microdose.
  4. You may need to further pulverize the ketamine at this point, which can be done by folding over the wax paper and running a plastic card over the top of it a few times.
  5. Blow your nose real good to clean out any gunk.
  6. Cut a small measure of a clean straw.
  7. Take a quick, deep sniff of the powder so that is travels to the back of the nasal cavity.

The Latest Science

Ketamine has been shown to be effective for patients suffering from chronic depression and bipolar disorder. Studies have shown that the effect of the drug is immediate or within 2 hours and consistent in relieving a patient’s depressive and/or suicidal symptoms, lasting up to 3 days after a single dose. In comparison, common antidepressants such as fluoxetine (Prozac) can take weeks to show therapeutic effects.

Ketamine is a racemate composed of the R-(−)-ketamine enantiomer (arketamine) and the S-(+)-ketamine enantiomer (esketamine). Esketamine inhibits the reuptake of the dopamine transporter about 8-fold more potently than does arketamine, and so is about 8 times more potent as a dopamine reuptake inhibitor. Arketamine appears to be more effective as a rapid-acting antidepressant than esketamine.

A study conducted in mice found that ketamine’s antidepressant activity is not caused by ketamine inhibiting NMDAR, but rather by sustained activation of a different glutamate receptor, the AMPA receptor, by a metabolite, (2R,6R)-hydroxynorketamine; as of 2017 it was unknown if this was happening in humans. Arketamine is a AMPA receptor agonist.

Anesthetic doses may not produce an antidepressant effect. While the research is limited, between .5 and 1mg/kg IV given over about 40 mins seems to be the optimal dose. A typical anesthetic dose is 1-2 mg/kg given over 2 minutes, followed by .5-1.8mg/kg/hr. Benzodiazepines and GABA agonist (both of which are often used alongside ketamine in anesthesia) may mitigate the antidepressant effect of ketamine.

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