Is a 1 mg intramuscular vitamin B12 injection safe for a pregnant woman with confirmed B12 deficiency and no known cobalamin allergy or severe renal hepatic impairment? Vitamin B12 Monthly Injection Dose: Typical Dosages & Administration Methods Liv Hospital McCartan's Boost Your Energy with ! Symptoms of low B12 includes: Constant fatigue Lack of energy Memory problems Pins and needles sensations Depression or mood Stay Active and Healthy with B12 Injection Viva Aesthetics & Wellness What is a B12 injection? , A B12 injection delivers a concentrated dose of vitamin B12 directly into the muscle for rapid absorption and effective replenishment of levels in the body., Vitamin B12