Drug Interaction Report

Rufinamide may reduce the blood levels and effects of macitentan. Contact your doctor if your symptoms worsen or your condition changes during treatment with these medications. 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. 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

Tadalafil can lower blood pressure, and combining it with alcohol may further increase this effect. You may be more likely to experience symptoms such as dizziness, lightheadedness, fainting, flushing, headache, and heart palpitations. You should avoid or limit the use of alcohol to not more than 4 alcohol-containing drinks during a small period of time while being treated with tadalafil, and use caution when getting up from a sitting or lying position. You may also want to avoid drinking large amounts of grapefruit juice, since it may increase the blood levels and effects of tadalafil. 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 can enhance the levels of rufinamide in your body. To ensure maximal oral absorption, rufinamide should be administered with or immediately after a meal. This will make it easier for your body to absorb the medication. Do not drink alcohol while you are taking rufinamide. Alcohol can increase some of the side effects including drowsiness or dizziness. Talk to your doctor or pharmacist if you have any questions or concerns.