The specific site for administration may vary depending on factors such as individual preference, body mass, age, and any underlying medical conditions
Diabetics who take metformin may have low B12 levels as a side effect of the drug
Generally, the effects of Vitamin B12 injections start waning after a week
The NHS schedule for treating B12 deficiency is a loading dose of 1mg hydroxocobalamin by intramuscular injection every two to three days for two weeks, then a maintenance dose every two to three months for life when the cause is non-dietary
Medications use, including cardiovascular prescriptions ACEI/ARB, -blocker, diuretics, anti-lipid agents, and anti-platelet agents, and Metformin, during the 30 days prior to the interview was ascertained from self-report [20]
How long does a B12 injection last