can you take b12 injections and tablets Vitamin vs. Oral Supplements: Which is Better? Are B12 Shots Safe? Royal

Common side effects include: Injection site reactions mild pain, redness, swelling, or bruising at the injection site, typically resolving within a few days Headache usually transient and manageable with standard analgesia Nausea or dizziness particularly in the initial treatment phase Skin reactions including itching, mild rash, or acneiform eruptions Temporary urine discolouration red or orange urine is harmless and expected Diarrhoea or flushing usually mild and self-limiting In patients with severe megaloblastic anaemia, low potassium levels (hypokalaemia) may occur during initial intensive treatment, but this is uncommon in routine maintenance therapy

So, an U100 insulin syringe is made just for U100 insulin

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Yet, follow the recommended dosage and any advice from your healthcare provider