Hello
As you stated that you are taking CELEBRAX i.e. celecoxib for
reactive arthritis .
Now read the side effects of celebrax,these are:
Headache, diarrhea, rhinitis, nausea, sinusitis, dyspepsia, and
abdominal pain.
I mentioned all the side effects ,so that you can understand that all these symptoms ,mentioned in your query are not due to the side effects of celebrax.
However, nausea, cramps , loss of appetite may be due to the
hyperacidity caused by celebrax.
Swelling over legs, weight gain ,
blurred vision , fine motor effects are definitely not due to side effects.
In my opinion consult a physician and get his opinion .
Good luck.
So
consult a neurologist and get his opinion regarding for these symptoms.