Tramadol is an opioid that also acts on serotonin, so it interacts on two fronts at once
The tramadol label warns of serotonin syndrome with serotonergic drugs, of seizures at the recommended dose, and of "profound sedation, respiratory depression, coma, and death" with benzodiazepines, antipsychotics or alcohol.
Reasonable evidence with real limitations. how we score evidence
Caveat on this rating: A label lists warnings the regulator requires; it does not give incidence. No figure for how often tramadol plus an SSRI produces serotonin syndrome was read for this row, and the Orlova 2018 row in this wave is a reminder that a labelled serotonergic interaction can turn out to be rare when measured.
Tramadol is prescribed as a painkiller, and many people taking an antidepressant will be offered it at some point. It carries three interaction warnings that matter to them.
Significant findings
The tramadol hydrochloride tablet label (Amneal, May 2026) lists among its Warnings and Precautions: "Serotonin Syndrome: May be life-threatening. Can occur with use of tramadol alone, with concomitant use of serotonergic drugs, with drugs that impair metabolism of serotonin or tramadol." And: "Risk of Seizure: Can occur at the recommended dose of tramadol. Concomitant use with other drugs may increase seizure risk. Risk may increase in patients with epilepsy, a history of seizures, and in patients with a recognized risk for seizures."
On sedatives, section 5.3: "Profound sedation, respiratory depression, coma, and death may result from the concomitant use of tramadol hydrochloride tablets with benzodiazepines and/or other CNS depressants, including alcohol (e.g., non-benzodiazepine sedatives/hypnotics, anxiolytics, tranquilizers, muscle relaxants, general anesthetics, antipsychotics, gabapentinoids [gabapentin or pregabalin], and other opioids)."
The label's own summary of the evidence: "Observational studies have demonstrated that concomitant use of opioid analgesics and benzodiazepines increases the risk of drug-related mortality compared to use of opioid analgesics alone. Because of similar pharmacological properties, it is reasonable to expect similar risk with the concomitant use of other CNS depressant drugs with opioid analgesics."
Worth asking
The two-front problem is specific to tramadol among common painkillers: it is an opioid, so it adds to sedatives, and it raises serotonin, so it adds to antidepressants. If a clinic offers tramadol and you take an SSRI, an SNRI, a tricyclic, lithium, buspirone, an antipsychotic or a benzodiazepine, say so before the prescription is written and ask what the alternative would be. The serotonin syndrome symptoms to know are in the linezolid and citalopram rows of this wave.
Source
Tramadol hydrochloride tablets: FDA-approved prescribing information, Boxed Warning and Warnings and Precautions 5.3, 5.9, 5.10 — Amneal Pharmaceuticals NY LLC; US Food and Drug Administration (2026)
Regulator or national health body
How this was scored
- Study design
- Regulatory safety determination
- Funding
- Industry funded
- Published in
- Regulator or national health body
- Sample size
- not recorded
- Preregistered
- not recorded
- Conflicts disclosed
- not recorded
- Independent of proponent
- not recorded
- Retracted
- No
Read the full scoring rubric, including what it can't tell you.
Published September 21, 2026.
Questions
How strong is the evidence behind this?
veisund rates this source "moderate evidence". Reasonable evidence with real limitations. It scores 57 out of 100 on our published rubric. One caveat travels with that badge: A label lists warnings the regulator requires; it does not give incidence. No figure for how often tramadol plus an SSRI produces serotonin syndrome was read for this row, and the Orlova 2018 row in this wave is a reminder that a labelled serotonergic interaction can turn out to be rare when measured. The score is calculated from recorded facts about the source — study design, funding, publication venue, sample size, preregistration — not typed in by an editor.
What is the source for this?
Tramadol hydrochloride tablets: FDA-approved prescribing information, Boxed Warning and Warnings and Precautions 5.3, 5.9, 5.10 — Amneal Pharmaceuticals NY LLC; US Food and Drug Administration (2026). Published in: Regulator or national health body. The full source is linked on this page so you can read it yourself.
Who paid for this research, and does that matter?
Study design: Regulatory safety determination. Funding: Industry funded. Independence from the proponent is not recorded. Industry sponsorship is one of the most reliably measured biases in medicine, which is why funding carries real weight in the score rather than sitting in a footnote.
Is this medical advice?
This is information to bring to your prescriber, not medical advice and not a reason to change anything on your own. Nothing here is an instruction to stop or reduce a medication. If you are in crisis, call or text 988.
This is information to bring to your prescriber, not medical advice and not a reason to change anything on your own. Nothing here is an instruction to stop or reduce a medication. If you are in crisis, call or text 988.