For intramuscular injection, insert the needle at a 90-degree angle into muscle (deltoid, thigh, or gluteus)
In such cases, intramuscular injections may be a better choice
As the However, while risks of severe toxicity are low, some side effects are still possible, such as: temporary symptoms, such as itching, swelling, or diarrhea allergic reaction damage from the injection hypokalemia, or low potassium levels infection negative interactions with certain medications, such as: metformin (Fortamet, Glucophage, Riomet) medications to reduce gastric acid, such as proton pump inhibitors or H2 receptor antagonists Always talk with a doctor before using vitamin B12 supplements
Gastrointestinal complications (gastroparesis): GLP-1 medications slow digestion by delaying stomach emptying
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