0 known interactions • 0 major • 0 moderate • 0 minor
Always disclose all medications to your healthcare providers — prescription medicines, OTC medications, vitamins, and herbal supplements. This list may not include every possible interaction. Use our free drug interaction checker to screen your complete medication list.
Potentially life-threatening or causing permanent damage. Avoid combination.
May worsen condition or require dose adjustment. Monitor closely.
Usually limited clinical effect. Manage with routine monitoring.
7 DRUG INTERACTIONS Because of the potential for increased risk of PML and other infections, Crohn's disease patients receiving TYSABRI should not be treated with concomitant immunosuppressants (e.g., 6-mercaptopurine, azathioprine, cyclosporine, or methotrexate) or inhibitors of TNF-α, and corticosteroids should be tapered in those patients with Crohn's disease who are on chronic corticosteroids when they start TYSABRI therapy [ see Indications and Usage ( 1.2 ), Warnings and Precautions ( 5.1 , 5.6 ) ]. Ordinarily, MS patients receiving chronic immunosuppressant or immunomodulatory therapy should not be treated with TYSABRI [ see Indications and Usage ( 1.1 ), Warnings and Precautions ( 5.1 , 5.6 ) ].
Source: FDA-approved prescribing information. Severity ratings are not assigned in this excerpt — ask your pharmacist to help interpret specific interactions.
Always ask your pharmacist about potential interactions with food, alcohol, and supplements specific to Tysabri. Some medicines have significant interactions with grapefruit juice, high-fat meals, dairy products, or vitamin K-rich foods.