Drug & supplement interaction

Vitamin A + Alitretinoin

Alitretinoin brand name: Panretin.

Major Interaction
Medically reviewed by · Updated September 2026
The bottom line Major

Vitamin A has a major interaction with Alitretinoin. Concomitant use of retinoids with vitamin A supplements might produce supratherapeutic vitamin A levels.

Read the full interaction report
SeverityMajor
LikelihoodProbable
EvidenceD
What do Severity, Likelihood & Evidence mean?
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Interaction report

Vitamin A and Alitretinoin

Here is the interaction we found between these two, with the evidence behind it.

Major

RETINOIDS

Why this applies to Alitretinoin

Alitretinoin falls under RETINOIDS — the group Vitamin A interacts with.

Concomitant use of retinoids with vitamin A supplements might produce supratherapeutic vitamin A levels.
Retinoids, which are vitamin A derivatives, could have additive toxic effects when taken with vitamin A supplements.
Severity Major Likelihood Probable Evidence D

Interaction has not been documented in well-controlled studies, however, the interaction has been demonstrated in some small human studies or in controlled animal studies in conjunction with multiple case reports..

Dr. Brian Staiger, PharmD, BCPS
Dr. Brian Staiger explains PharmD, Clinical Pharmacist

Here's the simple version: alitretinoin (Panretin) is itself a form of vitamin A, so think of it as already adding vitamin A to your body. If you stack a vitamin A supplement on top of it, the two can pile up together. The concern is too much total vitamin A activity, not the medication working better.

When vitamin A builds up, you can run into things like dry, peeling, irritated skin, headaches, dry eyes and lips, and feeling tired or achy. The good news is this warning is mostly based on how these compounds work, not on a long track record of real cases. Still, since both are vitamin A, I'd skip extra vitamin A supplements unless your doctor or pharmacist says otherwise. A normal balanced diet is usually fine.

Contact Dr. Brian directly if you have additional questions on this interaction
References
  1. Hansten PD, Horn JR. Drug Interactions Analysis and Management. Vancouver, WA: Applied Therapeutics Inc., 1997 and updates.

What These Ratings Mean

Every interaction above is graded three ways — here’s the key to each label.

Severity how clinically significant the interaction is
Major

Clinically significant. Avoid the combination, or use only under close professional supervision.

Moderate

Usually worth avoiding or managing — may need monitoring, a dose change, or timing apart.

Minor

Generally not serious. Be aware of it and mention it to your pharmacist.

Likelihood how strong the evidence is that the interaction actually happens in people
  • LikelyWell-controlled human studies have demonstrated the likely existence of this interaction.
  • ProbableInteraction has not been documented in well-controlled studies, however, the interaction has been demonstrated in some small human studies or in controlled animal studies in conjunction with multiple case reports.
  • PossibleInteraction has been documented in animal or in lab research, or the interaction has been documented in humans but is limited to case reports or conflicting clinical research exists.
  • UnlikelyInteraction has been demonstrated in animal or in lab research but has been shown not to occur in humans.
Evidence the quality of the studies behind the rating (graded A–D)
  • AHigh-quality meta-analysis (quantitative systematic review).
  • BCase-control study.
  • CConsensus.
  • DAnecdotal evidence.

These ratings are for information only. Never start, stop, or otherwise change your therapy before speaking with your provider.

Keep it in perspective

Vitamin A Also Interacts With Other Medications

Vitamin A has 8 major, 378 moderate known drug interactions in our database — the Alitretinoin one above is one of them. If you take anything else, check it against the full list below.

Major 8 Moderate 378 No known interaction 2,444 (incl. Alitretinoin)
Taking anything else?

Check Another of Your Medications Against Vitamin A

Covers the 2,830 medications we’ve checked against Vitamin A. Pick one to open its full report.

From our Q&A

Questions About Vitamin A or Alitretinoin

These are real questions from readers, answered by the pharmacists at HelloPharmacist — written by a person, not generated from a database. Each one covers Vitamin A or Alitretinoin, not necessarily both, but if one is close to what you were about to ask it will usually go further than a database entry can:

Not quite your question? Ask our pharmacists directly — it is free, there is no account required, and answers usually come back within 24 hours.

Everything else you take

See Every Supplement That Interacts With Alitretinoin

This page covers Vitamin A only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Alitretinoin page lists 38 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), Alfalfa (moderate), Angelica Archangelica (moderate), Arrach (moderate) and Bergamot (moderate).

By severity: 2 major · 26 moderate · 10 minor.

From our pharmacist’s overview on the Alitretinoin page

“Alitretinoin (Panretin) is a retinoid gel used on Kaposi sarcoma skin lesions, and because it is a vitamin A derivative, treat these 38 supplement interactions with genuine care. Two carry a major rating.”

Reviewed by 2 · Jul 18, 2026

Open the Alitretinoin interaction page

One more smart check

Taking Vitamin A as Part of a Dietary Supplement Product? Check It for Interactions

We hold 19,215 real supplement products containing Vitamin A, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Vitamin A. Your product may carry other ingredients that interact with Alitretinoin too, on top of Vitamin A — and those would not show on this page. Find your product and we’ll check every ingredient on its label:

How much people look this up

Where Vitamin A and Alitretinoin Sit Against Everything Else

Out of every supplement and medication people look up on HelloPharmacist, here is where these two land this week — and which way each has been moving.

Supplement Vitamin A
Top 1%

#11 of 1,452 supplements looked up here in the last 7 days

29 days ago today
Medication Alitretinoin
Top half

#939 of 2,830 medications looked up here in the last 7 days

29 days ago today

Position among everything looked up on this site, not a measure of how commonly either one is used or how important it is. A supplement can climb this list because of a news story. It counts every request to the page, automated ones included, and nothing here identifies anyone.

Supplement

About Vitamin A

What is Vitamin A?

  • Eye and vision health
  • Skin health and acne
  • Immune support
  • Correcting vitamin A deficiency
  • Childhood growth and development

Vitamin A is an essential nutrient important for vision, skin, immune function, and growth. Most people get enough from a balanced diet, and supplements are mainly useful for correcting a true deficiency. Because vitamin A is fat-soluble and can build up to harmful levels, more is not better, and high doses are especially risky in pregnancy.

Read the full Vitamin A monograph & all interactions
Medication

About Alitretinoin

What Is Alitretinoin Used For?

Brand name: Panretin

Panretin Gel is approved to treat cutaneous lesions — visible skin sores — in adults who have AIDS-related Kaposi's sarcoma (KS), a cancer that causes abnormal tissue to grow in the skin.

Panretin Gel is applied directly to the affected skin spots. It is not for use when the disease has spread widely enough to need systemic (whole-body) treatment — for example, when there are more than 10 new lesions in a month, or when the lungs, lymph nodes, or internal organs are involved.

See full Alitretinoin drug information
Keep checking

Other Drugs & Vitamin A

Browse every other medication we’ve checked against Vitamin A — both the ones with a known interaction and the ones without. Select any drug for the full detail.

8Major
378Moderate
0Minor
2,443No known interaction
8 Major 378 Moderate 2,443 No interaction
Major

8 interactions

Moderate

378 interactions

Showing 60 of 378 moderate interactions — see all 378 on the Vitamin A page.

No interaction 2,443 drugs checked — show the list

We also checked Vitamin A against these medications and found no known interaction in our sources. Open any page to confirm.

Showing the 60 most looked-up of 2,443 medications checked with no known interaction — see the full Vitamin A list.

See the full Vitamin A interactions page
See every supplement checked against Alitretinoin, ranked by severity
Sources

Sources & How We Checked

Interaction details are evidence-graded and sourced from the Natural Medicines database. The medication overview comes from MedlinePlus.

Content is written and reviewed by licensed HelloPharmacist pharmacists. See our data sources and editorial standards for how this information is built and checked.

Parts of this content are provided by the Therapeutic Research Center, LLC.

DISCLAIMER: Currently this does not check for drug-drug interactions. This is not an all-inclusive comprehensive list of potential interactions and is for informational purposes only. Not all interactions are known or well-reported in the scientific literature, and new interactions are continually being reported. Input is needed from a qualified healthcare provider including a pharmacist before starting any therapy. Application of clinical judgment is necessary.

© 2021 Therapeutic Research Center, LLC

Keep exploring
Vitamin A monograph › Uses, safety, and every drug interaction in one place Alitretinoin supplement interactions › Every supplement checked against Alitretinoin, ranked by severity Alitretinoin drug information › The full plain-English guide to this medication Supplement interaction checker › Check any supplement or product against your medications Browse medications A–Z › Every drug we've checked against herbs & supplements Ask a pharmacist › Free, personal answer from our licensed team
Pharmacist Counseling Corner

Taking Vitamin A and Alitretinoin Together: Common Questions

Can you take Vitamin A with Alitretinoin?
This is rated a major interaction, so the combination is best avoided unless your doctor or pharmacist has specifically told you otherwise. Read the full details on this page and confirm with your pharmacist before combining them.
How serious is the Vitamin A and Alitretinoin interaction?
We rate it Major. This is a clinically significant combination that is generally best avoided, or used only under the direct supervision of your physician or pharmacist.

Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy

Still Have a Question About Alitretinoin and Vitamin A?

Our pharmacists answer your medication & supplement questions — free.

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This information is for education only and is not a substitute for professional medical advice. Always check with your pharmacist or doctor before starting, stopping, or combining supplements and medications.