A wrong intramuscular (IM) injection can, in rare but serious cases, lead to paralysis or nerve damage. Here's a breakdown of how this can happen: 1. Nerve Injury Injecting into or too Common Mistakes in B12 Injections to Avoid Vitamin B12 Deficiency & Nerve Problems : What You Must Know Lipo B12 injections are given weekly and packed with substances that benefit your overall health and well being, including: Methionine, an amino acid that helps your body process fat through your liver Inositol, which