I have been advised to take Renerve injections every 3 months by my physician. I took the first injections in august and now have to take the second dose in November. I am experiencing some dizziness in the last week where the ENT feels that B12 deficiency also is a contributing factor beside hypothyroidism. I had a spell of dizziness few months back due to the ear fluid imbalance. should I take the b12doses every 2 months and will it be helpful if i take vitamin b12 tablets instead of injections?