Because these are intramuscular injections, some patients may experience mild and temporary side effects at the injection site, including: Soreness or tenderness Mild redness or swelling Minor bruising These symptoms are typically minimal and resolve quickly
While many peptides are considered safe, side effects can occur, and its important to discuss any unusual symptoms with your healthcare provider
Z Med Clinic & MedSpa
The most common side effect of B12 injections is irritation at the injection site, and injections are typically administered intramuscularly or subcutaneously. Less common side effects may include headache, nausea, diarrhea, itching, or a brief feeling of lightheadedness after the injection
Ng FM, Sun J, Sharma L, Libinaki R, Jiang WJ, Gianello R