Is Ketamine an Opioid?

Is ketamine an opioid? No. It works on NMDA receptors, not opioid receptors, even though a recent study seemed to suggest the opposite.

What to know:

• Naltrexone (which stops the effects of opioids) blocks ketamine’s antidepressant effect through brain chemistry “cross-talk.”
• Calling ketamine an opioid is incorrect and may scare patients from effective treatment.
• Ketamine’s rapid antidepressant effects help patients with treatment-resistant depression when supervised by medical professionals.

At Modern Behavioral, we prioritize patient education and safety when discussing new therapies. Wondering whether ketamine is an opioid is a valid question, especially since it has only been used to treat depression since 2019. Read on to understand ketamine’s drug classification and uses.

What Is Ketamine?

Ketamine is a dissociative anesthetic with FDA-approved medical uses in anesthesia and depression treatment. First developed in the 1960s, ketamine is not structurally or pharmacologically related to opioids. Modern Behavioral employs ketamine as part of integrative mental health approaches for select patients after thorough psychiatric evaluation and patient screening.

Medical Uses of Ketamine

According to the FDA, “The “S” form of ketamine, which is derived from ketamine and known as Spravato (esketamine), is a Schedule III controlled substance that was approved by FDA in 2019 as a nasal spray for treatment-resistant depression (TRD) in adults and depressive symptoms in adults with major depressive disorder with acute suicidal ideation or behavior, in conjunction with an oral antidepressant.”

Ketamine hydrochloride refers to a mixture of R- and S-ketamine, which are mirror-image molecules. This mixture is used through intravenous or intramuscular injection as general anesthesia. Only the S-ketamine form is approved in a nasal spray for TRD. S-ketamine also has fewer side effects than ketamine hydrochloride.

Opioids Explained

Opioids are a class of drugs used mainly for pain relief. Unlike ketamine, opioids bind directly to opioid receptors in the brain and body, creating their characteristic painkilling and euphoric effects.

What Are Opioids?

Opioids include prescription medications like morphine, oxycodone, and hydrocodone, as well as illegal substances like heroin. These drugs treat moderate to severe pain but also carry high risks for dependence, misuse, and overdose.

How Do Opioids Work?

Opioids attach to mu-opioid receptors, blocking pain signals and releasing dopamine. This mechanism produces pain relief but also causes sedation, respiratory depression, and, in some cases, addiction.

Is Ketamine an Opioid?

Ketamine is not an opioid. While both drugs can relieve pain, ketamine’s drug classification is as a dissociative anesthetic, not a narcotic analgesic. This means ketamine therapy is a safe option under the supervision of a professional, and it doesn’t carry the same risk of addiction as opioids.

Ketamine’s Drug Classification

Clinicians classify ketamine as a dissociative anesthetic and psychotropic medication alternative. This classification reflects its unique ability to induce dissociation and alter sensory perception without activating opioid receptors.

Differences Between Ketamine and Opioids

Ketamine does not cause respiratory depression, constipation, or the high overdose risk seen with opioids. Modern Behavioral uses ketamine within mental health treatment frameworks. Monitoring and safety protocols are essential for using both ketamine and opioids, but the risk profiles are distinct.

Why Do People Think Ketamine Is an Opioid?

Media coverage of a 2018 study by Stanford University and Palo Alto University caused widespread confusion by suggesting that ketamine is an opioid. This is because the study found naltrexone, a drug that blocks the effects of opioids, also blocks ketamine’s antidepressant effects.

However, Dr. Adam Kaplin of Johns Hopkins explains that ketamine actually acts on NMDA (N-methyl-D-aspartate) receptors, not opioid receptors. Its fast antidepressant effects depend on a separate brain pathway involving the mTOR control switch.

Although naltrexone disrupts this process through complex brain chemistry “cross-talk,” it does not prove that ketamine is an opioid.

Mislabeling ketamine this way could prevent patients with treatment-resistant depression from accessing an effective therapy, especially under strict medical supervision as required by the FDA.

Ketamine’s Mechanism of Action

Ketamine operates as an NMDA receptor antagonist, meaning it blocks certain signals in the brain to produce its effects. Ketamine’s influence allows your dopamine system to become more active, so you can find joy in things that have become lifeless. Ketamine also promotes neuroplasticity, which can boost mental wellness and support recovery for mood disorders.

How Ketamine Is Used for Depression

Ketamine is transforming mental health treatment, particularly for treatment-resistant depression, PTSD, and suicidal ideation. Modern Behavioral offers therapy integration sessions, wellness programs, and holistic care to maximize benefits and safety. That said, ketamine therapy is not a first-line treatment. Ketamine therapy helps depression that is resistant to other treatments, which means you must try other treatments first.

Effects on Mood

Patients experience relief from treatment-resistant depression and anxiety thanks to ketamine’s unique mechanism. Patients can experience a lifted mood in as little as 40 minutes. This can be a literal lifesaver if you’re struggling with severe depression.

Off-Label Uses

Clinicians sometimes use ketamine for trauma therapy and mood disorders outside of official FDA indications. Outpatient care, follow-up care, and side effects monitoring form the core of responsible off-label practice.

Risks and Side Effects of Ketamine

Like any therapeutic drug, Ketamine therapy has side effects. That said, Modern Behavioral ensures that every patient undergoes comprehensive screening and side effects monitoring before, during, and after ketamine therapy.

Common Side Effects

Short-term effects can include dizziness, dissociation, blurred vision, nausea, and increased blood pressure. Medical supervision and safety protocols reduce these risks during ketamine maintenance and treatment.

Comparing Risks: Ketamine vs. Opioids

Opioids carry a much higher risk of dependence, overdose, and death. Ketamine’s risks are largely psychological and dose-dependent, making it a safer option in properly supervised environments.

Signs of Ketamine Abuse and Addiction

Though less addictive than opioids, ketamine can still be misused. Evidence-based practice and close follow-up care minimize this risk in clinical settings. Ketamine can be found on the street under names like:

• Special K
• Kit Kat
• K
• Vitamin K
• Cat Valium
• Super C
• Super Acid

Recognizing Ketamine Dependence

Warning signs for ketamine dependence include compulsive use, increased tolerance, withdrawal from social settings, and mood instability. Family members and patients should seek professional evaluation if these symptoms appear.

How Ketamine Addiction Differs from Opioid Addiction

Opioid addiction produces severe physical withdrawal and craving. Ketamine addiction primarily affects psychological function, leading to dissociation and memory issues rather than physical pain.

Treatment for Ketamine Addiction

Modern Behavioral offers integrative mental health and recovery support for those struggling with addictions, including ketamine addiction. Outpatient detox prioritizes your comfort and a smooth transition toward sobriety.

Therapy Options and Recovery Support

Modern Behavioral takes a holistic, evidence-based approach to care, tailoring treatment to each individual and supporting you or your loved one in regaining control of life. Our therapeutic options target the root causes of addiction and encourage sustainable recovery, including:

• Individual and group therapy
• Herbal and supplement guidance
• Nutritional counseling
• Wellness shots

Bottom Line on Ketamine and Opioids

Ketamine is not an opioid. Its dissociative anesthetic properties, rapid-acting antidepressant effects, and unique clinical applications distinguish it from opioids. Modern Behavioral supports safe, evidence-based use for qualified patients.

Modern Behavioral offers personalized mental health care and innovative treatments designed to improve quality of life and mental wellness in Newtown and Wayne, PA. Reach out today for more information.

FAQ on Ketamine vs. Opioids

Below are a few frequently asked questions about the difference between ketamine and opioids.

Is ketamine safe when prescribed?

Ketamine is safe under medical supervision when prescribed for anesthesia or mental health treatment, following FDA guidelines and informed consent protocols.

Can ketamine be used with opioids?

Physicians may sometimes use ketamine and opioids together for severe pain, but Modern Behavioral specializes in ketamine-assisted psychotherapy, not physical pain management.

Is ketamine addictive?

Ketamine can be habit-forming in some cases, but it has a much lower risk of physical dependence than opioids. Modern Behavioral monitors side effects and provides follow-up care to reduce these risks.

How can I get ketamine for depression?

Ketamine therapy requires professional management. Contact Modern Behavioral for psychiatric evaluation and comprehensive outpatient care tailored to your needs.