Drug Interaction Report

Consumer information for this interaction is not currently available.

GENERALLY AVOID: Coadministration of topical tacrolimus with other immunosuppressive agents may potentiate the immunosuppressive effects of topical tacrolimus. However, data concerning its safety and efficacy in combination with immunosuppressants are not available. According to the prescribing information, rare cases of skin malignancy and lymphoma have been reported in patients who have received treatment with topical calcineurin inhibitors, including topical tacrolimus. On the other hand, systemic exposure from topical tacrolimus is reported to be less than 1 ng/mL. In addition, the lowest tacrolimus blood concentration from topical application at which systemic effects can be observed is unknown.

MANAGEMENT: According to the manufacturer, use of topical tacrolimus in immunocompromised patients is not recommended. Therefore, until further information is available, it may be advisable to avoid its concomitant use with other immunosuppressants. Screening for the development of malignancy during and after treatment may also be considered.

Grapefruit juice can increase the blood levels of futibatinib. This may increase side effects including dry or inflamed eyes, inflamed cornea, increased tears, disorder of the retina, high phosphate levels in your blood, redness, swelling, peeling or tenderness, mainly on the hands or feet, nails separating from the bed or poor formation of the nail, urinary tract infection, constipation, diarrhea, dry mouth, abdominal pain, fatigue, muscle and joint pain, decreased levels of blood cells (white blood cells, red blood cells, and platelets), and changes in liver function blood tests. You should avoid the consumption of grapefruit and grapefruit juice during treatment with futibatinib. Be sure to take the medication at approximately the same time every day to maintain consistent blood levels and effects. Talk to your doctor or pharmacist if you have questions on how to take this or other medications you are prescribed. 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.