Here is My Question:
I have been on Tysabri for a little over 2 years and now my white blood cell count and thyroid levels are low what does this mean?
A low white blood count (WBC) on Tysabri treatment is very rare and likely indicates an underlying medical issue. Tysabri normally elevates the WBC. Both hypo and hyperthyroidism (an underactive or overactive thyroid gland, respectively) can affect the WBC, but this is especially true of an individual with hypothyroidism. Ask your doctor to refer you to a endocrinologist. They may also refer you to a hematologist if your thyroid is not the explanation. Good luck
Revere P (Rip) Kinkel, MDProfessor of Clinical Neurosciences
Director of the Multiple Sclerosis Program
Clinical Neurosciences Director
University of California San Diego
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