If I took vitamin B12 injections and folic acid along with magnesium, a B complex, and carnitine, but there was no improvement and my condition actually worsened with increased anxiety, does this mean How should I manage a 33yearold patient with worsening anxiety, racing thoughts, low mood (3 10), grief, constipation, nocturnal urination, currently taking atomoxetine 40 mg daily (with occasional missed doses), vitamin D2 weekly, Feeling Tired All the Time? It Might Be a Vitamin B12 Deficiency Fusion HealthCare How Quickly Does B12 Shot Work? Duration of Benefits