Hello dear
Thanks for reaching out
First of all ankylosing spondylitis is extremely rare in females, so i hope we have enough evidences for the disease.
So now considering the diagnosis is correct, your doctor is unfortunately right about the treatment. In fact she might need some surgical treatment at some point of time if the disease causes her back to be stiff and forward bent, or if the disease involves other joints of the body..
That being said, neurobion forte is a
vitamin supplement and has no role in altering the course of this particular disease.
There are specific medicines to control the disease.
Regards
Dr Vipin Gupta