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Potential side effects include: Injection site reactions, including redness, swelling, bruising, pain, or irritation Mild fluid retention (edema) Joint or muscle discomfort Headache, dizziness, or flushing Changes in glucose regulation, particularly in individuals with diabetes or prediabetes Itching, restlessness, drowsiness, nausea, or difficulty swallowing (3) Importantly, the occurrence of potential side effects does not predict an individual's overall response to therapy

Monitoring and assessment Tracking progress helps evaluate whether the compound is producing desired effects

Where the oral route is not deemed adequate, initial treatment similar to that for patients with pernicious anemia may be indicated depending on the severity of the deficiency