adverse reaction to b12 injection Potential Vitamin Side Effects What Does a B12 Shot

Pernicious anemia, where the immune system attacks the stomach, makes this hard

The flu shot is safe, and you cannot get the flu from the flu shot

How Can You Make Sure You're Getting Enough Vitamin B12

Certain infections can affect your sense of smell and cause a metallic taste in the mouth, including: Bacterial infections Fungal infections Hepatitis HIV Helicobacter pylori Lyme disease Hansens disease Syphilis Cytomegalovirus COVID-19 Sinus infections Medications /Supplements Many medications can cause a metallic taste as a side effect, such as Antibiotics Antidepressants Antihistamines Blood pressure medications Chemotherapy drugs Supplements comprising iron , zinc, calcium, or multivitamins can also temporarily alter taste