Abrocitinib and Cannabidiol: Interaction Details
AI-assisted, pharmacist-reviewed · AI content regenerated Jul 11, 2026 · Source data updated Jul 10, 2026 · Sources: FDA labeling, DDInter 2.0, cited literature
Cannabidiol
Abrocitinib
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.
Let's talk about taking cannabidiol (Epidiolex) with abrocitinib (Cibinqo), the medicine for eczema. Your body uses a liver enzyme called CYP2C19 to break down abrocitinib. Cannabidiol can slow that enzyme down. When that happens, more abrocitinib can build up in your body, which may raise your chance of side effects.
The good news is this is based on how the drugs work in theory, not on strong real-world reports. Your care team can handle it easily. They may adjust your abrocitinib dose or keep a closer eye on how you're feeling. Please don't change anything on your own, just check in with your pharmacist or doctor.
Effect: Cannabidiol is a moderate CYP2C19 inhibitor. Abrocitinib is partly metabolized by CYP2C19, so coadministration may increase abrocitinib exposure (AUC/Cmax) and the risk of dose-related adverse reactions.
Direction: Increased substrate effect (abrocitinib accumulation).
- Mechanism: Inhibition of CYP2C19-mediated metabolism by cannabidiol.
- Onset: Unspecified.
- Evidence: Theoretical; magnitude not quantified.
- Management: Consider abrocitinib dose reduction as clinically appropriate; monitor for adverse effects and individualize dosing.
What happens
Increased CYP2C19 substrate exposure and an increased risk of CYP2C19 substrate-related adverse reactions
Interaction Deep Dive
When cannabidiol, which acts as a moderate inhibitor of CYP2C19, is given together with substrates of CYP2C19, the exposure to those substrates may rise, potentially raising the likelihood of adverse reactions. If cannabidiol is used at the same time as CYP2C19 substrates, reducing the dose of the substrates as clinically appropriate should be considered1.
Why it happens (mechanism)
Inhibition of CYP2C19-substrate metabolism by cannabidiol
How to manage this interaction
Here's how a care team typically handles this:
- They may reduce your abrocitinib dose if clinically appropriate while you're also taking cannabidiol.
- They may monitor you more closely for side effects.
- Any dose change would be tailored and individualized by your team.
What you should do: keep taking both medicines exactly as prescribed unless your prescriber tells you otherwise. Let your pharmacist or doctor know you take both, and report any new or worsening symptoms so they can adjust things if needed.
Management is individual — confirm any change with your pharmacist or prescriber.
Common questions
Can I take Abrocitinib and Cannabidiol together?
Cannabidiol can slow the breakdown of abrocitinib, potentially raising its levels and side-effect risk, so your care team may lower the abrocitinib dose or watch you more closely. Keep taking both as prescribed and let your pharmacist or doctor know you use them together. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Abrocitinib and Cannabidiol 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 Abrocitinib and Cannabidiol interaction managed?
Here's how a care team typically handles this: They may reduce your abrocitinib dose if clinically appropriate while you're also taking cannabidiol. They may monitor you more closely for side effects. Any dose change would be tailored and individualized by your team. What you should do: keep taking both medicines exactly as prescribed unless your prescriber tells you otherwise. Let your pharmacist… 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 Abrocitinib or Cannabidiol 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
Keep reading about Cannabidiol
Keep reading about Abrocitinib
These medications also interact with supplements
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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