[1] If the solution is drawn into a syringe for injection, it should be administered promptly for the same reason (avoid leaving the filled syringe exposed to light for long)
According to the National Institutes of Health, oral B12 has a 1 to 2 percent absorption rate
Signs of a severe allergic reaction (anaphylaxis) include: Skin rash, hives, or severe itching Swelling of the face, lips, tongue, or throat Difficulty breathing or wheezing A rapid heartbeat or a sudden drop in blood pressure If you ever develop swelling of the face or throat, trouble breathing, or other signs of a severe reaction after any injection, treat it as an emergency and call 911
Medication Summary last generated: 2026-06-17 06:26:21 B-12 Kit - Intramuscular (Cyanocobalamin B12 Injection) --- Hikma Pharma may require patient-specific counseling based on your prescription, directions, allergies, medical history, and other medications