can a b12 injection make you feel sick Vitamin Side Effects and Safety Feeling worse after B12 Injection:
Description
Another form of renal toxicity, generally associated with NSAIDs, is seen in patients with prerenal conditions leading to the reduction in renal blood flow or blood volume, where the renal prostaglandins have a supportive role in maintaining renal perfusion

(Yu et al., 2021) and Wang et al

Yang, X
Experimental designs vary between laboratories