I had ibs for last 10 years..9 months back I started feeling dizziness. I did my blood check and found my b12 level was 44 and vitamin d was also too low.also I had mild anemia. I took respective injections. Unknowingly I took b12 injection directly into vein without diluting it.dirctly through injection mode not by IV drip. When I took it for between small gap my symptoms went but once I started taking it between 14 days my dizziness came back I once again checked my blood.b12 was normal but mild anemia was their and infact it had increased. Is it had caused nerve damage??