Abrocitinib and Doxorubicin Hydrochloride Liposome: 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
Abrocitinib
Doxorubicin Hydrochloride Liposome
No brand names on record
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 abrocitinib (Cibinqo) together with liposomal doxorubicin, a chemotherapy medicine. Abrocitinib can block a kind of "pump" in your body (called P-gp) that normally helps move doxorubicin out. When that pump is slowed, more doxorubicin can build up in your body.
That extra buildup could mean more or stronger side effects from the chemo, like low blood counts, mouth sores, or nausea. This is based on how these drugs work rather than a specific study, so the concern is a precaution. The good news is your cancer team is well equipped to watch for this and adjust your care safely. Always keep them in the loop about every medicine you take.
Effect: Abrocitinib may inhibit P-gp mediated efflux of doxorubicin (a P-gp substrate), increasing doxorubicin exposure and the risk of dose related toxicities.
- Direction: Increased doxorubicin AUC/Cmax, enhanced toxicity (myelosuppression, mucositis, cardiotoxicity, GI effects).
- Mechanism: P-gp inhibition; PK based interaction.
- Evidence: Theoretical. No formal studies with the liposomal formulation; extrapolated from conventional doxorubicin.
- Onset: Unspecified.
- Management: Manufacturer advises avoiding concurrent use. If unavoidable, individualize dosing and intensify monitoring (CBC, cardiac and organ function, toxicity signs).
What happens
Increased DOXOrubicin exposure and an increased risk of DOXOrubicin-related adverse reactions
Interaction Deep Dive
Because DOXOrubicin is a P-gp substrate, its combined administration with P-gp inhibitors should be avoided, since this can raise DOXOrubicin exposure and thereby heighten both the frequency and the severity of adverse reactions1. Formal drug interaction studies involving the DOXOrubicin hydrochloride liposome injection have not been conducted; nevertheless, this formulation may interact with agents that are recognized to interact with conventional DOXOrubicin2.
Why it happens (mechanism)
Inhibition of P-gp-mediated efflux transport of DOXOrubicin
How to manage this interaction
Here is how a care team usually handles this:
- Because of the potential for increased chemo exposure, your team may prefer to avoid using these two together when possible, or choose a different option.
- If both are needed, your doxorubicin dose may be adjusted and individualized, and your team may monitor you more closely (such as blood counts and how you are tolerating treatment).
What you can do:
- Keep taking both exactly as prescribed unless your care team tells you otherwise.
- Make sure your oncologist and pharmacist know you take abrocitinib.
- Report new or worsening side effects promptly.
Management is individual — confirm any change with your pharmacist or prescriber.
Common questions
Can I take Abrocitinib and Doxorubicin Hydrochloride Liposome together?
Abrocitinib may raise doxorubicin levels and side effects by blocking a transporter (P-gp), so the combination is generally avoided or, if needed, managed with dose adjustment and close monitoring by your cancer team. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Abrocitinib and Doxorubicin Hydrochloride Liposome 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 Doxorubicin Hydrochloride Liposome interaction managed?
Here is how a care team usually handles this: Because of the potential for increased chemo exposure, your team may prefer to avoid using these two together when possible, or choose a different option. If both are needed, your doxorubicin dose may be adjusted and individualized, and your team may monitor you more closely (such as blood counts and how you are tolerating treatment). What you can do:… 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 Abrocitinib or Doxorubicin Hydrochloride Liposome 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 (2)
- Product Information: Doxorubicin hydrochloride intravenous injection, doxorubicin hydrochloride intravenous injection. Pfizer Labs (per Dailymed), New York, NY, 2024. DailyMed
- Product Information: DOXIL(R) intravenous injection, doxorubicin HCl liposome intravenous injection. Janssen Products LP (per FDA), Horsham, PA, 2019. DailyMed
Keep reading about Abrocitinib
Keep reading about Doxorubicin Hydrochloride Liposome
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