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Other medicines and TYSABRI: Tell the doctor if the patient is taking or has recently taken or might take any other medicines.
The patient must not use TYSABRI if he/she is being treated with other medicines to treat the MS, such as beta-interferons or glatiramer acetate.
The patient may not be able to use TYSABRI if he/she is currently receiving or has previously received medicines that affect the immune system, e.g. mitoxantrone or cyclophosphamide.
