How Ketamine Is Used As An Adulterant

How Ketamine Is Used As An Adulterant

A new study just found that there are a number of people testing positive for ketamine that never took ketamine on purpose. It was in something else. Here's what the data says, and how to check your own supply to stay safe. 

The Numbers 

Researchers from the US surveyed and tested oral fluid from 1,819 adults entering nightclubs, comparing lab results against what people actually said they'd used. 23.7% tested positive for ketamine, but only 10.8% of the group reported using it in the past 24 hours. This means that among the people who tested positive for ketamine, only 41.5% said they'd actually taken it. That means the majority of people who had ketamine in their system that night had no idea it was there.

A risk factor for unintentional ketamine exposure was found to be other drug use (based on detection and on self-reports) such as cocaine. This study tells us that ketamine isn't just being sold as ketamine anymore, however it is being used as an adulterant in other substances. 

Why Would Ketamine Be Hiding in Your Coke or Molly?

Ketamine is cheap to produce and easy to source compared to a lot of other party drugs, which makes it an attractive filler for dealers looking to stretch a batch or fake a stronger high. It's also the backbone of most "pink cocaine" or tusi mixes; those are almost never actual cocaine, and ketamine is usually the main ingredient doing the work.

The Dissociative Effect Can Hide In Plain Sight

Ketamine's dissociative, numbing effects can blend into or get mistaken for the come-up of other substances, especially in low doses or in a mixed sample. That's part of why unintentional exposure is so easy to miss in the moment, you might just chalk up a weird or unexpectedly heavy feeling to "bad batch" rather than "different drug entirely."

What This Actually Means for You

If you've ever felt off after a night out and couldn't quite explain why, this is one possible reason. The takeaway is to test the drugs you already have, even the ones you're confident about. Our Ketamine Test Kit checks specifically for the presence of ketamine in a sample, which means it's not just for people buying ketamine on purpose. It's just as useful for checking your MDMA, cocaine, or anything else in your stash for a substance you weren't expecting.

It's important to note this kit tells you whether ketamine is present, not how much, and it can't identify other substances that might also be in the sample. It's one piece of the puzzle, not a full toxicology report. Pair it with purity or identification testing for whatever you think you actually bought.

Your Next Steps

•       Test drugs you think you already know. Unintentional ketamine exposure was more common than intentional use in this study. Even a substance you trust is worth checking. Grab a Ketamine Test Kit specifically for checking your MDMA, cocaine, or other party drugs for hidden ketamine, not just for ketamine itself.

•       Remember the limits. A positive result means ketamine is present, full stop. It won't tell you purity or catch other adulterants, so combine it with other testing when you can.


Source: Palamar et al., "Differentiating intentional ketamine use from unintentional exposure as an adulterant using oral fluid testing," Journal of Forensic Sciences (2026)