It could be that you are allergic to one or other of the "excipients" (or ingredients) of the hydroxocobalamin injections you are having
Additionally, Pernicious anemia, an autoimmune condition affecting the stomachs ability to produce intrinsic factor (a protein necessary for B12 absorption), can also lead to deficiency
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SLU-PP-332 Based on 1 publication(s) in Google Scholar SLU-PP-332 is a pan- Estrogen Receptor/ERR agonist with EC 50 values of 98, 230 and 430 nM for ERR , ERR and ERR , respectively
The preservative content enables multi-use stock vial workflows over extended laboratory timeframes
So you may want to first get your levels checked and/or ask your doctor if supplementation is recommended for you before taking a daily pill