Side Effects: Hydroxocobalamin has been used for decades and it has a long and proven safety record with very few reports of side effects affecting patients
Taking the diabetic medication, Metformin, is associated with a higher risk for Vitamin B12 deficiency
Dietary Limitations: Many "fad" diets focus on extreme calorie reduction, which can slow metabolism over time and lead to nutrient deficiencies
General Laboratory Controls No Human or Veterinary Use Do not ingest, administer, prescribe, dispense, or use for personal experimentation
[106] Other drugs [edit] Certain medications can decrease the absorption of orally consumed vitamin B 12 , including colchicine, extended-release potassium products, and antibiotics such as gentamicin, neomycin and tobramycin
I get my 1ml vials of b12 from a local pharmacy for my cat and I've recently noticed that some of the bottles look only 1/2 full and some only half or less than half full