Precision is everything when it comes to injections! Did you know that the angle of the needle completely changes where the medication goes? From reaching the muscle to just under the Types of injections explained Intramuscular (IM) Inserted at 90 to deliver medication deep into the muscle, allowing relatively fast absorption due to rich blood supply. Subcutaneous (SC) Inserted at about 45 Administering a Intramuscular B12 Injection : 5 Steps Instructables B12 Injections Highlands Medical Subcutaneous (SC) and Intramuscular (IM) Injections Must Knows for Subcutaneous administration: Pinch skin with non dominant hand and hold syringe with dominant hand Always inject: 2 inches away from umbilicus (for abdomen) 3 inches