Tag: Rectus femoris

Millions of intramuscular injections for vaccines and medications are administered annually. So, what is the best site for thigh injection to ensure safety and efficacy? The **vastus lateralis** muscle is the most recommended site for nearly all age groups.

An estimated 20 injections are given to administer drugs for every one vaccine administered via intramuscular (IM) injection [1.8.2]. For thigh injections, the key question is: which muscle is injected in the thigh? The answer lies in the large, accessible quadriceps muscles.