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Drug Interactions between ospemifene and Paxlovid

This report displays the potential drug interactions for the following 2 drugs:

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Interactions between your drugs

Moderate

ritonavir ospemifene

Applies to: Paxlovid (nirmatrelvir / ritonavir) and ospemifene

Ritonavir may increase the blood levels and effects of ospemifene. This may increase the risk of side effects such as hot flush, blood clots, heart attack, stroke, and breast or endometrial cancer. You may need a dose adjustment or more frequent monitoring by your doctor to safely use both medications. You should seek immediate medical attention if you experience chest pain, shortness of breath, and/or pain or swelling in the arms or legs, as these may be symptoms of a blood clot. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.

Drug and food interactions

Moderate

ritonavir food

Applies to: Paxlovid (nirmatrelvir / ritonavir)

Ritonavir should be taken with food to lessen gastrointestinal side effects. It is important that you take this medication exactly as prescribed by your doctor. Do not change your treatment or stop treatment without first talking to your doctor.

Moderate

ospemifene food

Applies to: ospemifene

Food significantly increases the absorption of ospemifene. You should take ospemifene with a meal, preferably at the same time each day. Taking it on an empty stomach may lead to inadequate blood levels and reduced effectiveness of the medication.

Therapeutic duplication warnings

No warnings were found for your selected drugs.

Therapeutic duplication warnings are only returned when drugs within the same group exceed the recommended therapeutic duplication maximum.

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Drug Interaction Classification

These classifications are only a guideline. The relevance of a particular drug interaction to a specific individual is difficult to determine. Always consult your healthcare provider before starting or stopping any medication.
Major Highly clinically significant. Avoid combinations; the risk of the interaction outweighs the benefit.
Moderate Moderately clinically significant. Usually avoid combinations; use it only under special circumstances.
Minor Minimally clinically significant. Minimize risk; assess risk and consider an alternative drug, take steps to circumvent the interaction risk and/or institute a monitoring plan.
Unknown No interaction information available.

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

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