Rarely, but yes. I have a family history of pernicious anemia (B-12) and iron deficiency anemia. I began getting the shots because my levels were really low and oral vitamins weren't helping. I received the injections weekly for about a month, but stopped due to the migraines and vomiting that would occur several days following the treatment.
Other people asked questions on various topics, and are still waiting for answer. Would be great if you can take a sec and answer them