b.sc nursing notes on Instagram: "Not All Shots Are Created Equal – Your Quick Guide to Injection Types Ever wondered why some shots go in your arm muscle and others just under the skin? Here’s the breakdown: Intramuscular (IM) → Deep into the muscle (vaccines, hormones) Subcutaneous (SC) → Into the fatty layer (insulin, blood thinners) Intravenous (IV) → Straight into the vein (instant effect) Intradermal (ID) → Just under the skin surface (TB tests, allergy testing) Intraosseous (IO) → Into bo