24 year old woman with Pseudotumour cerebri, how worried should I be about taking prescribed acetazmolide causing aplastic anemia?

Acetazolamide. Aplastic anemia associated with acetazolamide is rare. One report from Sweden reported this side effect in 11 patients over 17 years, however the average age of the patents was 71 years. This is the only medical therapy available for pseudo tumor cerebri. An alternative is to have CSF drainage periodically to lower the CSF pressure to within normal limits, which often helps with the symptoms.