Acetaminophen And Codeine and Zolmitriptan: Interaction Details
AI-assisted, pharmacist-reviewed · AI content regenerated Jul 11, 2026 · Source data updated Jun 30, 2026 · Sources: FDA labeling, DDInter 2.0, cited literature
Acetaminophen And Codeine
Zolmitriptan
How we grade severity & evidence
Severity levels
- Contraindicated: These should generally not be used together.
- Major: Potentially serious — often needs a change or close monitoring.
- Moderate: Can be significant — usually manageable with monitoring.
- Minor: Usually limited clinical impact.
Evidence grades
- Established: Well documented — supported by controlled studies or strong clinical data.
- Probable: Good supporting evidence, though not definitively proven.
- Suspected: Some evidence suggests this interaction, but it is not well established.
- Possible: Limited or conflicting evidence; the interaction may occur.
- Theoretical: Predicted from the drugs' pharmacology; not yet confirmed in people.
Ratings come from the documented interaction literature and are reviewed by a pharmacist. They describe the documented risk of the combination, not what will necessarily happen to you — your dose, timing, and health picture all matter.
You've been prescribed acetaminophen with codeine (a pain reliever) along with zolmitriptan (Zomig, a migraine medicine). Both of these can raise a brain chemical called serotonin. When two serotonin-raising drugs are combined, there is a small chance of a reaction called serotonin syndrome.
Signs to watch for include feeling agitated or confused, a fast heartbeat, sweating, shivering, muscle twitching or stiffness, and shakiness. This is considered a theoretical concern, meaning it is not common, but it's worth knowing about. The good news is your care team can manage this safely by keeping an eye on you, especially when you first start or change a dose.
Effect: Additive serotonergic activity raising the theoretical risk of serotonin syndrome when codeine (opioid) is combined with zolmitriptan (5-HT1B/1D agonist triptan).
- Mechanism: Additive central serotonergic effects (PD interaction, not PK).
- Direction: Increased serotonergic burden.
- Severity/Evidence: Major severity on file, but evidence is theoretical; onset unspecified.
- Management: If co-use is needed, monitor closely, particularly at initiation and dose changes. Watch for autonomic instability, neuromuscular abnormalities (clonus, hyperreflexia, rigidity), and mental status changes. Discontinue codeine if serotonin syndrome is suspected.
What happens
Increased risk of serotonin syndrome
Interaction Deep Dive
Serotonin syndrome has been reported when opioids like codeine are taken together with serotonergic agents. When such combined therapy is necessary, monitor the patient closely, especially when starting treatment and when altering the dose. Stop codeine if serotonin syndrome is suspected123.
Why it happens (mechanism)
Additive serotonergic effects
How to manage this interaction
Your care team can keep this combination safe. Typically they will:
- Monitor you more closely, especially when you first start either drug or when a dose is changed.
- Watch for warning signs like agitation, confusion, fast heartbeat, sweating, shivering, muscle twitching, or stiffness.
Keep taking both medications as prescribed unless your prescriber tells you otherwise. If you notice any of the symptoms above, contact your doctor or pharmacist right away. It's also a good idea to ask them whether this combination is right for you and how to spot problems early.
Management is individual — confirm any change with your pharmacist or prescriber.
Literature reports
1 report — tap to read
Common questions
Can I take Acetaminophen And Codeine and Zolmitriptan together?
Combining codeine with zolmitriptan carries a small, mostly theoretical risk of serotonin syndrome; keep taking both as prescribed but watch for symptoms like agitation, sweating, fast heartbeat, or muscle twitching and report them promptly. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Acetaminophen And Codeine and Zolmitriptan interaction?
It is rated major. Potentially serious — often needs a change or close monitoring.
How quickly could this interaction happen?
The documented onset is "unspecified". The timing of this interaction is not well characterized.
How is the Acetaminophen And Codeine and Zolmitriptan interaction managed?
Your care team can keep this combination safe. Typically they will: Monitor you more closely, especially when you first start either drug or when a dose is changed. Watch for warning signs like agitation, confusion, fast heartbeat, sweating, shivering, muscle twitching, or stiffness. Keep taking both medications as prescribed unless your prescriber tells you otherwise. If you notice any of the sym… Management is individual — always follow your own care team's guidance.
How strong is the evidence for this interaction?
The evidence is graded "theoretical". Predicted from the drugs' pharmacology; not yet confirmed in people.
Questions for your pharmacist
- Does my dose of Acetaminophen And Codeine or Zolmitriptan need adjusting while I take them together?
- What symptoms should prompt me to call you or my prescriber right away?
- Does the timing of my doses matter for this combination?
- Is there a safer alternative to one of these medications for me?
References (3)
- Product Information: Codeine sulfate oral tablets, codeine sulfate oral tablets. West-Ward Pharmaceuticals Corp (per DailyMed), Eatontown, NJ, 2016. DailyMed
- Product Information: Codeine sulfate oral solution, codeine sulfate oral solution. Hikma Pharmaceuticals USA Inc(per FDA), Berkeley Heights, NJ, 2023. DailyMed
- Product Information: Codeine sulfate oral tablets, codeine sulfate oral tablets. Hikma Pharmaceuticals USA Inc. (per FDA), Berkeley Heights, NJ, 2023. DailyMed
Keep reading about Acetaminophen And Codeine
Keep reading about Zolmitriptan
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Prescription drugs aren't the whole picture — herbal and dietary supplements can interact with them too. From the evidence-graded Natural Medicines database:
major · moderate · minor — check everything you take with our drug–supplement interaction checker.
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