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Imatinib Mesylate and Ospemifene

Determining the interaction of Imatinib Mesylate and Ospemifene and the possibility of their joint administration.

Check result:
Imatinib Mesylate <> Ospemifene
Relevance: 05.11.2022 Reviewer: Shkutko P.M., M.D., in

In the database of official manuals used in the service creation an interaction registered by statistical results of studies was found, which can either lead to negative consequences for the patient health or strengthen a mutual positive effect. A doctor should be consulted to address the issue of joint drug administration.

Consumer:

Imatinib 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.

Professional:

MONITOR: Coadministration with drugs that are known to inhibit both CYP450 3A4 and 2C9 may increase the plasma concentrations of ospemifene, which is primarily metabolized by these isoenzymes, with additional contribution from CYP450 2C19 and other pathways. The interaction has been studied with fluconazole, a moderate CYP450 3A4/potent CYP450 2C9/moderate CYP450 2C19 inhibitor. In 14 postmenopausal women given fluconazole 400 mg once followed by 200 mg daily for a total duration of 8 days, administration of ospemifene 60 mg after breakfast on day 5 of fluconazole treatment resulted in 1.7- and 2.7-fold increases in ospemifene peak plasma concentration (Cmax) and systemic exposure (AUC), respectively, compared to administration of ospemifene alone. The potential for increased risk of adverse events such as hot flush, thromboembolism, and endometrial or breast cancer should be considered.

MANAGEMENT: Caution is advised if ospemifene is used in combination with drugs that are inhibitors of both CYP450 3A4 and 2C9. Patients should be advised to seek medical attention if they develop potential signs and symptoms of thromboembolism such as chest pain, shortness of breath, and pain or swelling in the arms or legs.

References
  • "Product Information. Osphena (ospemifene)." Shionogi USA Inc, Florham Park, NJ.
Imatinib Mesylate

Generic Name: imatinib

Brand name: Gleevec

Synonyms: Imatinib

Ospemifene

Generic Name: ospemifene

Brand name: Osphena

Synonyms: n.a.

In the course of checking the drug compatibility and interactions, data from the following reference sources was used: Drugs.com, Rxlist.com, Webmd.com, Medscape.com.

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Disease interaction