Drug Interaction Report

Using givinostat together with tamoxifen may increase the risk of experiencing a change in the electrical activity of your heart called QT prolongation, which may result in irregular heartbeats that can be life-threatening. You might be more susceptible to this risk if you have heart problems or electrolyte disturbances (for example, magnesium or potassium loss due to severe or prolonged diarrhea or vomiting, which are commonly reported as side effects of givinostat treatment). Your doctor may be able to prescribe alternatives that do not interact, or you may need more frequent monitoring of your electrocardiogram to safely use both medications. You should seek immediate medical attention if you experience an irregular heartbeat or feel dizzy, lightheaded, or faint during treatment. 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.

Talk to your doctor before using tamoxifen with soy products. There is some evidence that substances present in soy may stimulate breast tumor growth and interfere with the action of tamoxifen, although this has not been proven. Whether soy products are effective for hot flashes is also uncertain. 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 increases the absorption of givinostat. To ensure adequate blood levels of the medication, givinostat should be administered with food. Additionally, food can help mask the bitter taste of the oral suspension. Follow up with your healthcare professional if you have any additional questions.