why am i still tired after b12 injections When Do You Feel Less Shot? Are Vitamin B12 Shots Right

It plays a vital role in energy production[2], red blood cell[3] formation and nervous system function[4], making it crucial for overall health

Aside from allergies, there are no other absolute contraindications to vitamin B in appropriate doses

These include: Allergic Reaction Injection allergic reaction icon- Picture Courtesy: vectorstock.com Although, the allergic reaction to this vitamin injection is rare, yet it may cause redness, soreness, or pain on the injection site

Notably, it can potentially affect the efficacy or side-effect profile of drugs such as nitroglycerin, nitrates, and some chemotherapy agents