Intramuscular (IM) Injection:Angle: 90 degreesCommon Sites: Deltoid muscle, vastus lateralis, and gluteus maximus.Subcutaneous (SC) Injection:Angle: 45 degrees (can also be 90 degrees if the needle is short and the person has more subcutaneous tissue)Common Sites: Outer aspect of the upper arm, abdomen, front of the thigh.Intradermal (ID) Injection:Angle: 10-15 degreesCommon Sites: Inner forearm, upper back under the shoulder blade.Intravenous (IV) Injection:Angle: 25 degrees initially to enter the vein, then drop to about 10-15 degrees to advance the needle into the vein.Common Sites: Veins in the forearm, back of the hand.Intra-articular Injection:Angle: Varies depending on the specific joint being targeted, but typically around 45 degrees.Common Sites: Knee, shoulder, elbow, hip.
