can a b12 injection give you a headache I've had migraine since Sept 4th. I took that day (prescribed by my doctor) so I'm wondering if it's related or coincidence. I'm scared to take another one On-The-Go B12 Injection at enTrust

A U-100 insulin syringe

In these cases, even the largest oral dose wont significantly spike your levels, since your body is unable to utilize the vitamin

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If you're taking antibiotics such as chloramphenicol, colchicine, folic acid, methotrexate, and para-aminosalicylic acid, your doctor may have to monitor your condition for any possible side effects

Situations or conditions that can cause vitamin B12 deficiency include: You are more likely to develop vitamin B12 deficiency if you have one or more of the following risk factors: Left untreated, vitamin B12 deficiency can cause lasting side effects that affect your nervous system and brain

what not to do after a B12 injection - Do not rub or vigorously massage the site