Drug Interaction Report

Using mavacamten together with esomeprazole may alter the blood levels of both medications. Specifically, the blood levels of mavacamten may increase, which may lead to increased risk of heart failure, a condition where the heart is unable to pump blood adequately to meet the body's needs. At the same time, esomeprazole levels may decrease, which may make the medication less effective in treating your condition. Talk to your doctor if you have any questions or concerns. Your doctor may be able to prescribe alternatives that do not interact, or you may need a dose adjustment or more frequent monitoring to safely use both medications. You should seek medical attention if you experience signs and symptoms of heart failure such as shortness of breath, chest pain, fatigue, swelling in your legs, palpitations, or rapid weight gain. 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.

Grapefruit juice may increase the blood levels of mavacamten and increase the risk of heart failure, a condition where the heart is unable to pump blood adequately to meet the body's needs. Your risk may be further increased if you develop a serious infection or irregular heartbeat during treatment with mavacamten. You should avoid the consumption of grapefruit and grapefruit juice while taking this medication. Talk to your doctor if you have any questions or concerns. You should seek medical attention if you experience signs and symptoms of heart failure such as shortness of breath, chest pain, fatigue, swelling in your legs, palpitations, or rapid weight gain. 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.

Food may interfere with the absorption of esomeprazole. Esomeprazole should be taken at least one hour before meals and at the same time every day. When esomeprazole is given to patients receiving continuous enteral nutrition (tube feedings), the tube feeding should be interrupted for at least 1 hour before and 1 hour after the dose of esomeprazole. This will make it easier for your body to absorb the medication. 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.