Early neurologic symptoms include circumoral numbness, tinnitus, metallic taste, visual disturbances, agitation, and tremor
With no head-to-head data, comparing the two requires stitching together studies that differ in species, model, route, endpoint, and molecule a chain with several weak links
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Dont double up doses
If it was anything other than sterile saline, it may have been a preservative that you reacted to, such as benzyl alcohol