Dexmedetomidine and Acetaminophen And Codeine: Interaction Details
AI-assisted, pharmacist-reviewed · AI content regenerated Jul 11, 2026 · Source data updated Jul 1, 2026 · Sources: FDA labeling, DDInter 2.0, cited literature
Acetaminophen And Codeine
Dexmedetomidine
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.
Your medicine acetaminophen with codeine is an opioid pain reliever, and dexmedetomidine is a strong sedative used in medical settings. Both of these calm down your brain and nervous system. When they are used together, those calming effects can stack up.
That can lead to very deep sleepiness, slowed or shallow breathing, low blood pressure, and in serious cases trouble waking up. This concern is based mostly on how these drug types behave together rather than lots of direct studies, but it is still taken seriously. The good news is your care team can manage this by using the lowest doses needed and watching you closely. Talk with your pharmacist or doctor before combining them.
Effect: Additive CNS and respiratory depression when codeine/acetaminophen is combined with dexmedetomidine, an alpha-2 agonist sedative.
- Mechanism: Pharmacodynamic (additive CNS depression); not a CYP-mediated PK interaction. Note codeine is a prodrug (CYP2D6 to morphine), but the risk here is additive sedation, not altered activation.
- Direction: Increased sedation, hypotension, respiratory depression, risk of coma/death.
- Evidence/onset: Theoretical; onset unspecified. Severity: major.
- Management: Avoid unless alternatives inadequate; use lowest effective doses and shortest duration; monitor sedation, respiratory rate, and blood pressure; consider naloxone availability.
What happens
An increased risk of respiratory and CNS depression
Interaction Deep Dive
Avoid concomitant use of opioid cough medication formulations and CNS depressants. Concomitant use of opioid analgesics with benzodiazepines has been associated with increased rates of emergency department visits and fatal overdose2. Concomitant use of codeine with CNS depressants can increase the risk of hypotension, respiratory depression, profound sedation, coma and death. Reserve concomitant prescribing of these drugs for use in patients for whom alternative treatment options are inadequate. Limit dosages and durations to the minimum required. Follow patients closely for signs of respiratory depression and sedation. If concomitant use is warranted, consider prescribing naloxone for the emergency treatment of opioid overdose 341.
Why it happens (mechanism)
Additive CNS depression
How to manage this interaction
This combination can add up to too much sedation and slowed breathing, so your care team handles it carefully.
- Keep taking both exactly as prescribed unless your doctor tells you otherwise, and do not stop on your own.
- Your team may use the lowest doses for the shortest time needed, and the dose of one or both may be adjusted and individualized for you.
- Expect closer monitoring for sedation, low blood pressure, and breathing changes.
- Your prescriber may consider having naloxone on hand as a safety measure.
Call your pharmacist or doctor right away if you notice extreme drowsiness, confusion, or slow/shallow breathing.
Management is individual — confirm any change with your pharmacist or prescriber.
Literature reports
4 reports — tap to read
a) In one study, the frequency of emergency department visits related to nonmedical use that occurred between 2004 and 2011 and involved opioid analgesics together with benzodiazepines rose significantly from 11 to 34.2 per 100,000. Deaths from drug overdose attributable to prescribed and higher than prescribed doses of both drug classes likewise rose significantly from 0.6 to 1.7 per 100,000, and overdose deaths attributable to benzodiazepines rose significantly from 18% to 31% 2.
b) In a prospective cohort study, the rate of overdose deaths involving the dispensing of both opioid analgesics and benzodiazepines was 10 times greater than with the dispensing of opioid analgesics alone (7 versus 0.7 per 10,000 person years) 2.
c) In a cohort study using data from 2004 to 2009, the risk of fatal overdose rose significantly by 2.33 fold among patients taking opioid analgesics who had a prior benzodiazepine prescription and rose by 3.86 fold among those with a current benzodiazepine prescription, compared with patients taking opioid analgesics who had no history of a benzodiazepine prescription. The risk of drug overdose deaths grew as daily doses of benzodiazepines increased 2.
d) Observational studies have shown that using opioid analgesics together with benzodiazepines raises the risk of drug-related mortality relative to using opioid analgesics alone. Given their comparable pharmacological properties, it is reasonable to anticipate a similar risk when other CNS depressant drugs are used concurrently with opioid analgesics 34.
Common questions
Can I take Dexmedetomidine and Acetaminophen And Codeine together?
Combining acetaminophen/codeine with dexmedetomidine can cause dangerous additive sedation and slowed breathing, so it should be avoided unless necessary and then used at the lowest dose with close monitoring. Check with your doctor or pharmacist before using both. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Dexmedetomidine and Acetaminophen And Codeine 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 Dexmedetomidine and Acetaminophen And Codeine interaction managed?
This combination can add up to too much sedation and slowed breathing, so your care team handles it carefully. Keep taking both exactly as prescribed unless your doctor tells you otherwise, and do not stop on your own. Your team may use the lowest doses for the shortest time needed, and the dose of one or both may be adjusted and individualized for you. Expect closer monitoring for sedation, low b… 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 Dexmedetomidine or Acetaminophen And Codeine 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 (4)
- Product Information: CARISOPRODOL, ASPIRIN, CODEINE PHOSPHATE oral tablets, carisoprodol, aspirin, codeine phosphate oral tablets. Ingenus Pharmaceuticals LLC (per DailyMed), Orlando, FL, 2021. DailyMed
- US Food and Drug Administration (FDA): Drug Safety Communications: FDA warns about serious risks and death when combining opioid pain or cough medicines with benzodiazepines; requires its strongest warning. US Food and Drug Administration (FDA). Silver Spring, MD. 2016.
- 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 Dexmedetomidine
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