Mixing DXM (robo) and MXE
Unsafe
Both act on serotonin, so together they risk serotonin syndrome. Avoid this combination.
There is a risk of serotonin syndrome when combining DXM with MXE, due to DXM and MXE both being SRI’s. MXE and DXM having notable affinities for the serotonin transporter.
This combination carries bodily risk and can go badly psychologically. The headspace part often arrives first and makes the physical part harder to notice.
Headspace vs physical riskWhat to do
- Say what was taken and how much.Responders need it, and in most US states Good Samaritan laws protect both of you from drug possession charges when you call for an overdose.
- Unresponsive: put them on their side, tilt the head back, and stay until help arrives.Never leave someone alone to “sleep it off”.
- Never Use Alone 1-800-484-3731Stays on the line and sends help if you stop responding.
- Full steps: what to do if it is already happeningOverdose signs, the recovery position, what to say on the call, and whether you can be charged for making it.
- Poison Control 1-800-222-1222Free and 24/7, for “is this bad?” before it becomes an emergency.
Can you mix DXM (robo) and MXE?
MixSafe rates mixing DXM and MXE as "Unsafe" — risk of serious physical or psychological harm. Not recommended under any circumstances. Source: TripSit drug combination chart, retrieved 2026-08-20. Educational information, not medical advice.
- DXM
- Cold medicines often add acetaminophen or an antihistamine — check the label
- DXM also called
- robo, robitussin, robotussin, syrup, dex, cough syrup
- MXE also called
- methoxetamine
TripSit drug combination chart, retrieved 2026-08-20. View the dataset.
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All combinations →Rated unsafe. Educational information only, not medical advice. Absence of a documented interaction is not evidence of safety.