In clinical trials common side effects included: Nausea, vomiting Diarrhoea, constipation Low blood sugar (when used with certain diabetes medications) Loss of appetite, indigestion, abdominal pain Dizziness, low blood pressure, tiredness Allergic reactions Serious side effects include: Pancreatitis (inflamed pancreas) Gallstones Gastroparesis Hypoglycemia (very low sugar levels) If you experience any serious side effects, you should contact NHS 111
[DOI] [PubMed] [Google Scholar] 108.Yamada K, Wada E, Santo-Yamada Y, Wada K
Your doctor may arrange investigations including a full blood count, serum folate levels, and in some cases, anti-intrinsic factor antibodies if pernicious anaemia hasn't been previously confirmed
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This distinguishes it from cyanocobalamin, a more common but inactive form that the body must first convert