Before taking and while you take VUMERITY® (diroximel fumarate), tell your healthcare provider about all of your medical conditions, including if you:
Tell your healthcare provider about all the medicines you take, including prescription and over-the-counter medicines, vitamins, and herbal supplements.
Your healthcare provider should do a blood test to check your white blood cell count and liver function before you start treatment with VUMERITY and while you're on therapy.