29/04/2026
💉 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° into the subcutaneous fatty layer beneath the skin, providing slower and more controlled absorption.
Intravenous (IV)
Inserted at a shallow angle (around 15–30°) directly into a vein, allowing immediate delivery into the bloodstream.
Intradermal (ID)
Inserted at 10–15° into the dermis just beneath the epidermis, commonly used for skin tests and certain vaccines.
Each technique targets a specific tissue layer, which directly affects how quickly the drug is absorbed and its clinical purpose.
