Good Evening, My mother has been taking Remicade for several y...

Good Evening, My mother has been taking Remicade for several years now. I believe 4 years. She has ankylosing Spondylitis. Nasty nasty disease. The drug has worked like a charm so far. Aside from the temporary side effects during the first few hours of injection - tiredness, drowsy, etc. After that, shes as good as a goat. Recently, shes been experiencing a loss of recent recent, very recent memories. Sometimes a convo here she wont remember or take a while to remember. Or convo yesterday she wont remember at all. Also her ability to compute math problems in her head on the spot has decreased. She has a hard time doing any simple math. She was never like this. Being in the medical field, her wit and brain power were her key features. Now that have dwindled, shes having difficulties coping with her loss. Shes been tested for Dimentia and other ailments when reaching the age of 51. So far, soo good. No such things. I would like to know, if this side-effect ( if i can call it that) is permanent or temporary Her doctor in charge of her dosages has reduced her treatment volume to fewer ml and will prolly resort to other meds as well. See how it fairs in the months to come If anyone has any cases similar to this. Please relate and re-iterate! God-bless!