Bexarotene with Vitamin A Interaction Details

Brand Names Associated with Bexarotene

  • Bexarotene
  • Targretin® Capsules

Brand Names Associated with Vitamin A

  • Aquasol A
  • beta-carotene
  • retinol
  • retinyl acetate
  • retinyl palmitate
  • Vitamin A

Medical Content Editor
Last updated Mar 04, 2024

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Interaction Effect

An increased risk of retinoid toxicity

Interaction Summary

In clinical studies, patients receiving bexarotene were advised to limit their vitamin A intake to less than 15,000 units daily. Because of the similarities between bexarotene and vitamin A, patients should be advised to limit their intake of vitamin A supplements to avoid retinoid toxicity[1].

Severity

Moderate

Onset

Delayed

Evidence

Probable

How To Manage Interaction

Patients receiving bexarotene therapy should be advised to limit their vitamin A supplementation.

Mechanism Of Interaction

Additive toxic effects

References

    1 ) Product Information: Targretin(R), bexarotene. Ligand Pharmaceuticals Incorporated, San Diego, CA, 1999.

Bexarotene Overview

  • Bexarotene is used to treat cutaneous T-cell lymphoma (CTCL, a type of skin cancer) in people whose disease could not be treated successfully with at least one other medication. Bexarotene is in a class of medications called retinoids. It works by stopping the growth of cancer cells.

See More information Regarding Bexarotene

Vitamin A Overview

  • Vitamin A is used as a dietary supplement when the amount of vitamin A in the diet is not enough. People most at risk for vitamin A deficiency are those with a limited variety of food in their diet and in those with cystic fibrosis (an inborn disease that causes problems with breathing, digestion, and reproduction) and malabsorption problems (problems absorbing food). Vitamin A is used to prevent and treat xerophthalmia (unable to see in low light) and night blindness. Vitamin A is in a class of medications called an antioxidant. It is needed by the body to help with vision, reproduction, cell growth, and to support the immune system. It works to protect your cells against free radicals and to support cell growth and function.

See More information Regarding Vitamin A

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Definitions

Severity Categories

Contraindicated

These drugs, generally, should not be used together simultaneously due to the high risk of severe adverse effects. Combining these medications can lead to dangerous health outcomes and should be strictly avoided unless otherwise instructed by your provider.


Major

This interaction could result in very serious and potentially life-threatening consequences. If you are taking this drug combination, it is very important to be under close medical supervision to minimize severe side effects and ensure your safety. It may be necessary to change a medication or dosage to prevent harm.


Moderate

This interaction has the potential to worsen your medical condition or alter the effectiveness of your treatment. It's important that you are monitored closely and you potentially may need to make adjustments in your treatment plan or drug dosage to maintain optimal health.


Minor

While this interaction is unlikely to cause significant problems, it could intensify side effects or reduce the effectiveness of one or both medications. Monitoring for changes in symptoms and your condition is recommended, and adjustments may be made if needed to manage any increased or more pronounced side effects.

Onset

Rapid: Onset of drug interaction typically occurs within 24 hours of co-administration.

Delayed: Onset of drug interaction typically occurs more than 24 hours after co-administration.

Evidence

Level of documentation of the interaction.

Established: The interaction is documented and substantiated in peer-reviewed medical literature.

Theoretical: This interaction is not fully supported by current medical evidence or well-documented sources, but it is based on known drug mechanisms, drug effects, and other relevant information.

How To Manage The Interaction

Provides a detailed discussion on how patients and clinicians can approach the identified drug interaction as well as offers guidance on what to expect and strategies to potentially mitigate the effects of the interaction. This may include recommendations on adjusting medication dosages, altering the timing of drug administration, or closely monitoring for specific symptoms.

It's important to note that all medical situations are unique, and management approaches should be tailored to individual circumstances. Patients should always consult their healthcare provider for personalized advice and guidance on managing drug interactions effectively.

Mechanism Of Interaction

The theorized or clinically determined reason (i.e., mechanism) why the drug-drug interaction occurs.

Disclaimer: The information provided on this page is for informational purposes only and should not be considered medical advice. Always consult with a qualified healthcare professional regarding your specific circumstances and medical conditions.

Where Does Our Information Come From?

Information for our drug interactions is compiled from several drug compendia, including:

The prescribing information for each drug, as published on DailyMED, is also used. 

Individual drug-drug interaction detail pages contain references specific to that interaction. You can click on the reference number within brackets '[]' to see what reference was utilized.

The information posted is fact-checked by HelloPharmacist clinicians and reviewed quarterly.