what gauge needle for im injection of b12 to use Needles for B12 injections? what gauge needle/size syringe for

Vitamin B12 is a water-soluble vitamin excreted through urine, not associated with gastrointestinal side effects like constipation

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Delivering the vitamin directly into the muscle or through the nose bypasses a damaged digestive system to quickly repair the nerves.Vitamin B12 (IM/nasal) Generic Name: Cyanocobalamin / Methylcobalamin US Brand Names: Nascobal (Nasal Spray), Cobolin-M, generic Cyanocobalamin injection vials Route of Administration: Intramuscular (IM) Injection, Intranasal (Nasal Spray) FDA Approval Status: Fully FDA-approved in the United States and globally recognized as an essential medicine to treat Vitamin B12 deficiency, pernicious anemia, and associated neurological complications

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This technique may be useful in mass inoculation programmes