What is the correct technique for administering an intramuscular injection?

What is the correct technique for administering an intramuscular injection?

• A. Insert the needle at a 45 degree angle.
• B. Insert the needle at a 30 degree angle.
• C. Insert the needle at a 90 degree angle with a quick smooth motion.
• D. Insert the needle at a 120 degree angle.

Answer: (C)

When giving an intramuscular injection, you want the medicine to reach the muscle tissue beneath the skin and subcutaneous fat. That’s best achieved by inserting the needle perpendicular to the skin, at a 90-degree angle. A 90-degree angle ensures the needle passes through the skin and fat and enters the muscle, which affects how the medication is absorbed. Angles like 45 or 30 degrees would end up delivering into just the subcutaneous layer, not the muscle, and a very steep angle (like 120 degrees) wouldn’t properly access the muscle either. A quick, smooth injection helps minimize tissue trauma and pain while ensuring consistent deposition into the muscle.

When giving an intramuscular injection, you want the medicine to reach the muscle tissue beneath the skin and subcutaneous fat. That’s best achieved by inserting the needle perpendicular to the skin, at a 90-degree angle. A 90-degree angle ensures the needle passes through the skin and fat and enters the muscle, which affects how the medication is absorbed. Angles like 45 or 30 degrees would end up delivering into just the subcutaneous layer, not the muscle, and a very steep angle (like 120 degrees) wouldn’t properly access the muscle either. A quick, smooth injection helps minimize tissue trauma and pain while ensuring consistent deposition into the muscle.