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 B12 Shots in Friso, Sherman,

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

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

Ng FM, Sun J, Sharma L, Libinaka R, Jiang WJ, Gianello R

The study found that serum B12 levels were comparable, and in some cases higher, among those using the sublingual supplement (1)

Oral supplements tend to be more budget-friendly for long-term use, especially if available over the counter

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