still tired after my b12 injection Vitamin shots: Uses, benefits, and side effects Why do I feel worse

B-Complex Vitamin B Complex is a group of eight essential water-soluble vitamins that play vital roles in various physiological functions, including energy production, metabolism, nerve function, and red blood cell formation

It should be used carefully in those with kidney or liver impairment

Proton pump inhibitors or histamine type 2 (H2)-receptor antagonists: Medications to treat gastric disorders that interfere with or suppress gastric acid and intrinsic factor production can lead to decreased vitamin B12 absorption (3) (4)

It typically begins 2 to 4 months after the onset of rapid weight loss and resolves within 6 to 12 months

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