adverse reaction to b12 injection Potential Vitamin Side Effects B12 Shots: Vitamin B12 Injections

Primarily animal and lab-based data

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

Epub 2010 May 5

If your body has trouble absorbing B12 through the digestive tract, injections are especially helpful because they deliver the vitamin directly into your bloodstreambypassing the gut entirely