hives after b12 injection injection? : r/Zepbound Is Your Injection Site Reaction

Since lipotropic and vitamin B12 shots are injected intramuscularly bypassing the digestive process, they start to work immediately

continue vitamin supplementation during treatment and for 21 days after the last dose of PEMFEXY to reduce the severity of hematologic and gastrointestinal toxicity of pemetrexed [see Dosage and Administration (2.4)]

Medical Conditions, Surgeries, and Medications Lack of intrinsic factor (a protein made in the stomach thats needed for B12 absorption) - this condition is called pernicious anemia Thyroid disease HIV/AIDS (human immunodeficiency virus/acquired immunodeficiency syndrome) Autoimmune diseases like type 1 diabetes, where the immune system in the body attacks its own tissues Gastric bypass surgery (weight loss surgery) Chronic gastritis surgery Certain medications like heartburn drugs (proton pump inhibitors) which reduce stomach acid production Who Is At Risk of Vitamin B12 Deficiency

Metabolic syndrome pandemic

Sep 2021;39:101080