Once reconstituted, most sources recommend using the vial within 28 days
The documented handling is to take it soon if several days remain before the next scheduled dose, or skip it otherwise never double up, because two doses close together stacks the incretin effect and reliably provokes GI symptoms
These should be described separately and investigated for gastrointestinal, cardiopulmonary, or urologic causes as appropriate
As the deficiency may be indistinguishable for either of these essential vitamins, they are often grouped in one product for therapeutic and preventive use
The original poster's symptoms sound like normal B12 neurological recovery symptoms to me - similar to those experienced by me and many others here
Liver function parameters were assessed using the ALT assay kit (Bestbio, BB-47448) and AST assay kit (Bestbio, BB-47449)