Cannabidiol and Acetaminophen And Codeine: 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
Cannabidiol
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 pain medicine contains codeine, which is an opioid, plus acetaminophen (Tylenol). Cannabidiol (Epidiolex) is a CBD medicine used for certain seizures. Both codeine and CBD can calm down your central nervous system, so taking them together may make you feel extra sleepy, drowsy, or foggy.
This is based mostly on how these medicines work rather than lots of real-world reports, but it's worth taking seriously. Please be careful about driving or using machinery until you know how the combination affects you. The good news is your care team can manage this easily by watching how you feel and adjusting things if needed. Let them know if you feel unusually sleepy.
Effect: Additive CNS depression with increased risk of sedation and somnolence when combining acetaminophen/codeine (opioid CNS depressant) with cannabidiol.
- Mechanism: Additive pharmacodynamic CNS depression (no prodrug reversal relevant here; codeine's opioid effect and CBD's sedative effect are additive).
- Direction: Increased sedative burden.
- Severity/Evidence: Rated major; evidence is theoretical.
- Onset: Unspecified.
- Management: Monitor for somnolence and sedation. Counsel patients not to drive or operate machinery until tolerance is established. Doses may be individualized and patients monitored more closely by the care team.
What happens
Increased risk of CNS depression and an increased risk of sedation and somnolence
Interaction Deep Dive
Concomitant use of cannabidiol, which is a CNS depressant, with another CNS depressant may increase the risk of sedation and somnolence. Monitor for somnolence and sedation and advise patients not to drive or operate machinery until they have gained sufficient experience on cannabidiol1.
Why it happens (mechanism)
Additive CNS depression
How to manage this interaction
Keep taking both medicines as prescribed unless your prescriber tells you otherwise. Here is how a care team usually handles this:
- They may monitor you more closely for drowsiness and sedation, especially when either dose changes.
- Doses may be adjusted and individualized by your team if you feel too sleepy.
- Avoid driving or operating machinery until you know how the combination affects you.
Tell your pharmacist or doctor if you notice unusual sleepiness, slowed breathing, or trouble staying alert.
Management is individual — confirm any change with your pharmacist or prescriber.
Common questions
Can I take Cannabidiol and Acetaminophen And Codeine together?
Taking codeine/acetaminophen with cannabidiol can add up to extra drowsiness and sedation, so avoid driving until you know how you react and tell your care team if you feel too sleepy. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Cannabidiol 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 Cannabidiol and Acetaminophen And Codeine interaction managed?
Keep taking both medicines as prescribed unless your prescriber tells you otherwise. Here is how a care team usually handles this: They may monitor you more closely for drowsiness and sedation, especially when either dose changes. Doses may be adjusted and individualized by your team if you feel too sleepy. Avoid driving or operating machinery until you know how the combination affects you. Tell y… 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.
From our Q&A
Real reader questions about these medications, each personally answered by our pharmacist:
Questions for your pharmacist
- Does my dose of Cannabidiol 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 (1)
- Product Information: EPIDIOLEX(R) oral solution, cannabidiol oral solution. Jazz Pharmaceuticals, Inc. (per FDA), Palo Alto, CA, 2025. DailyMed
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