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
A patient with Pernicious Anemia cannot do this
How often should you get a B12 injection
Blood cell production typically begins improving within 35 days, haemoglobin rises over 12 months, whilst neurological recovery may take several months
[2] When used in supplementation, all of the vitamin B 12 vitamers have been argued to be beneficial, with there not being clear evidence that any are relatively more or less effective
For example, some state Medicaid plans may cover Enbrel for conditions like rheumatoid arthritis if it meets specific criteria and prior authorizations are obtained