feeling worse after b12 injection how long does the vitamin take to work B12 Injection: Answering concerns can b12 injections cause anxiety

and Comirnaty-BNT162b2, Pfizer-BioNTech), and three vaccines used nonreplicative adenoviral vectors (Vaxzevria/Covishield/AZD1222/ChAdOx1-spike, AstraZeneca/Serum Institute of India

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Vitamin B-12 deficiency symptoms may include: strange sensations, numbness, or tingling in the hands, legs, or feet difficulty walking (staggering, balance problems) anaemia a swollen, inflamed tongue difficulty thinking and reasoning (cognitive difficulties), or memory loss weakness fatigue While an experienced physician may notice the symptoms and be able to detect a vitamin B-12 deficiency with a good interview and physical exam, a blood test is needed to confirm the condition

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