IM Injection Sites – Complete List Of Intramuscular Injection Sites


There are plenty of ways to administer medicine within human body.

IM injections are one of the most famous & commonly used ways of administering medicine by health care industry. IM injections in being practised since long time.

What is an intra-muscular injection?

Medicine that we push (or shoot) into muscle mass is known as intramuscular injection. Many medicine must be administered in muscles to get their best effect as well as proper absorption.

Intramuscular injection generally given in four sites but it also depends on age, size of muscle, and amount of medicine.

In adult generally there are four different sites –

1. Deltoid Muscle of Arm

First of all expose the arm make there upside down triangle .but remember the triangle should cover acromian process of bone .the point of angel is at the level of armpit. The exact position is I’M injection is center of triangle slightly below the acromian process

But this site should not be chosen if muscle mass is very thin

2. Vastus Lateralis Muscle of Thigh

Vastus Lateralis


This side is considered best site for children because of more muscle mass. This is simple site for I’M injections, just divide thigh in 3 equal parts, and administer medicinal injection in middle part of thigh.
Basically it goes at junction of upper and middle third of thigh

3. Ventro Gluteal Muscle of Hip

For correct position ask your patient to lie down on his (or her ) side then place your heel of hand on outer & upper side of thigh so that finger should point to patients head & thumb will point towards groin. Now make V shaped position by separating your index finger from others. Remember your ring finger and little finger should feel bony pelvis thumb towards groin region. Make V position in between middle and index finger this is correct injection site

4. Dorso Gluteal Muscle of Buttock

Easy method to find out this side is to divide the buttock in four equal quarter . Upper and outer side of quarter is used for the injection

In neonates generally below 12 month of age Vasolateralis muscle of thigh is best position as we discussed before. Divide thigh into 3 equal parts & middle part is used for the injection . Antrolateral part of middle thigh is generally used.
Never give IM injection in buttock region of neonates under 12 month because there is chance of damage of sciatic nerve.

Common precautions for all adults & neonates is that if blood enters in the syringe during injection then immediately remove the needle, because u may damage or hit the vein and should not be continue

How to give an IM injection (Intra muscular injections)

1. Wash your hands with soap and use gloves if necessary.

2.Clean the injectable area means where you are going to give an injection with spirit or alcohol wipe

3. You should be confident about the site of intramuscular injection

4. Then hold the syringe in writing style (as like you hold a pen), angle then push the needle into the desired site. Some experts ask to hold syringe in 90 degree angle.

5. After inserting needle into muscle pulls the plunger of syringe back if it brings blood then there are chances that you are entered in vein & might going wrong. If this happens remove the needle and change the side. If it contains air after pulling plunger then continue with it.

6. Push the plunger of syringe to inject medicine in muscle.

7. Remove the needle with syringe in same manner and same angle

8. Destroy the needle after use.

Click here to check out Angles for inserting different injections


1. Remove needle with syringe it it shows blood on pulling plunger that means u hit the vein.

2. Must take immediate care if rashes or itching occurs after injection.

3. Should take immediate care if a swelling occurs on mouth lips or face.


About the author

Dr. Narendra

Narendra is a practicing doctor from India and has a passion for teaching. He loves to write and help others to understand the subject better with his influencing communication skill.

Click here to add a comment

Leave a comment: