Abiraterone Acetate with Ospemifene Interaction Details
Brand Names Associated with Abiraterone Acetate
- Abiraterone
- Zytiga®
Brand Names Associated with Ospemifene
- Ospemifene
- Osphena®
Medical Content Editor Dr. Brian Staiger, PharmD
Last updated
Feb 25, 2024
Interaction Effect
Increased ospemifene exposure and increased risk of adverse events
Interaction Summary
The concomitant use of ospemifene (a CYP3A4 and CYP2C9 substrate) and a dual CYP3A4 and CYP2C9 inhibitor may increase the exposure of ospemifene. If ospemifene is used concomitantly with a CYP3A4 and CYP2C9 inhibitor, closely monitor ospemifene levels[1] and adjust the ospemifene dosage as required.
Severity
Major
Onset
Unspecified
Evidence
Theoretical
How To Manage Interaction
If ospemifene (a CYP3A4 and CYP2C9 substrate) is used concomitantly with a dual CYP3A4 and CYP2C9 inhibitor, closely monitor patient for increased adverse effects from ospemifene[1] and adjust the ospemifene dosage as required.
Mechanism Of Interaction
Inhibition of CYP3A4- and CYP2C9-mediated metabolism of ospemifene
References
1 ) Product Information: OSPHENA(TM) oral tablets, ospemifene. Shionogi Inc. (per manufacturer), Florham Park, NJ, 2013.
Abiraterone Acetate Overview
-
Abiraterone is used in combination with prednisone to treat a certain type of prostate cancer that has spread to other parts of the body. Abiraterone is in a class of medications called androgen biosynthesis inhibitors. It works by decreasing the amount of certain hormones in the body.
Ospemifene Overview
-
Ospemifene is used to treat changes due to menopause (''change of life,'' the end of monthly menstrual periods) in and around the vagina that can cause painful sexual intercourse and vaginal dryness. Ospemifene is in a class of medications called hormones. It works by replacing estrogen that is normally produced by the body.
Return To Our Drug Interaction Homepage
Feedback, Question Or Comment About This Information?
Ask Dr. Brian Staiger, PharmD, our medical editor, directly! He's always more than happy to assist.
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.