b12 injection sub q or im Cyanocobalamin – 1000 mcg/mL B12 vitamin Store Intramuscular vs

For a deeper dive, explore The Benefits of Vitamin B12: What You Need to Know

Vitamins B1, B6, and B12 are water-soluble, and as such, when absorbed into the body, they are excreted via the kidneys

Common side effects include, but may not be limited to: pain or redness at the injection site mild diarrhea pruritus (itching) increased swelling joint pain dizziness headache nervousness or anxiety Serious side effects may include: allergic reactions peripheral vascular thrombosis hypokalemia (low potassium levels) pulmonary edema (fluid build-up around or in the lungs) thrombocytosis congestive heart failure There have been reports of anaphylactic shock and death after the parenteral administration of vitamin B12

This usually settles within a day or two