Vitamins, including vitamin C, are added to the IV drip along with minerals and amino acids
The most frequently described autoimmune manifestation was immune thrombocytopenic purpura (ITP, n=25/715, 3.5%) which affected 11% of the individuals with Kabuki syndrome (22/197) (77, 79, 8284, 86, 156, 158, 168171) as well as some patients with ICF syndrome type 1 (146, 152, 154) and Rubinstein-Taybi syndromes (115, 116, 126128)
Take your hCG or sterile water out of the refrigerator 15 minutes beforehand so it hits room temperature before you inject it
B12 injections are generally safe to have alongside most medications and supplements