Common, mild side effects: Pain, redness, or itching at the injection site Mild nausea or diarrhea Headache Temporary dizziness Rare but more serious reactions: Allergic reactions (rash, swelling, breathing difficulty) Heart palpitations Low potassium levels during rapid correction of severe deficiency Very rare cases of anaphylaxis requiring emergency care Seek medical attention immediately if you experience symptoms of a serious allergic reaction
For injectable products, extra attention to strength, route, storage, and supplies helps prevent avoidable order errors
Diagnosis can be rather complex as the symptoms can take years for it to surface
Your doctor will typically monitor your response through clinical improvement and blood tests such as full blood count, rather than rechecking B12 levels after starting injections
The sections below summarize what published laboratory studies report about this compound and its molecular target