best way to inject b12 Vitamin C and Injection Techniques Treating Severe Vitamin B12 Deficiency

Eussen, 2006

Tiaminal B12 injections are given once or twice a week, based on the deficiencys severity and the patients response

Occasional mild reactions may include temporary redness or soreness at the injection site, a brief metallic taste, or mild dizziness that quickly passes

Pang, Y., Wang, C., & Yu, L

Treatment with intranasal cyanocobalamin should be delayed until symptoms resolve in patients with nasal congestion, allergic rhinitis, and upper respiratory infection

The frequency of B12 injections varies based on the severity and cause of deficiency: For significant deficiencies or pernicious anemia, daily or weekly shots may be started, then tapered to monthly maintenance doses