What is Ketamine?

Ketamine’s initial approval by the U.S. FDA in the 1970s was for its use as an anesthetic, and it quickly became a vital tool in emergency surgery, especially in trauma cases (2). Its rapid onset and short recovery time made it ideal for inducing anesthesia in high-risk situations.

However, ketamine’s potential extends beyond its anesthetic properties. In recent decades, researchers have explored its use in mental health treatments, particularly for treatment-resistant depression. Unlike conventional antidepressants that can take weeks to show results, ketamine has been found to provide rapid relief, sometimes within hours (3). This breakthrough has redefined how severe depression is treated. Despite its dual role as a recreational drug, ketamine’s promise as a therapeutic tool is growing.

Ketamine’s Therapeutic Uses: Beyond Anesthesia

Although originally developed for its anesthetic properties, ketamine’s range of applications has expanded significantly, particularly in the mental health field. Some of its key uses include:

1. Depression and Anxiety: Ketamine is now widely used off-label to treat treatment-resistant depression and other mental health conditions. Low doses, administered intravenously or as esketamine via nasal spray, have shown remarkable efficacy in reducing depressive symptoms quickly (4).
2. Chronic Pain: Ketamine is also employed as a pain management tool, particularly as an alternative to opioids. Its ability to block NMDA receptors helps reduce pain without the addiction risks associated with opioids (5).
3. Asthma: Studies suggest that ketamine may help in acute asthma attacks due to its bronchodilatory effects, providing relief in situations where other medications fail (6).
4. PTSD: Although still in the experimental phase, ketamine is being investigated as a potential treatment for post-traumatic stress disorder (PTSD). Its dissociative properties might help patients distance themselves from traumatic memories (6).

Risks and Side Effects of Ketamine

Despite its therapeutic benefits, ketamine carries certain risks, especially when misused. Its side effects can vary depending on the dose and duration of use.

Short-term Side Effects: At low, therapeutic doses, ketamine can cause side effects such as dizziness, nausea, and dissociative experiences. These effects tend to be short-lived but can still be challenging for some patients (3).

Long-term Risks: Prolonged or high-dose use of ketamine, particularly in recreational settings, can result in serious side effects, including cognitive impairment, liver damage, and bladder toxicity (2). Chronic recreational use can lead to ketamine cystitis, a condition that causes severe bladder damage.

Recreational Use of Ketamine: A Growing Concern

The recreational use of ketamine has increased significantly over the past decades. On the street, ketamine is commonly referred to as “Special K”, “K”, or “Vitamin K” (2). Users often seek its dissociative effects, which can include intense hallucinations and a sense of detachment from reality.

However, recreational use is fraught with dangers. Ketamine can cause neurological damage, mental health problems, and bladder toxicity, especially when used regularly or in high doses. The European Union has reported a sharp rise in ketamine seizures, with quantities tripling between 2021 and 2022 (5). Street ketamine is often mixed with other substances, such as MDMA and cocaine, which increases the risk of toxic interactions. It is commonly sold in these mixtures, sometimes labeled as "tusy," as discussed in our recent post (check on our blog: What is Tusy? for more information about this topic).