Category: Injection methods

Medical professionals administer hundreds of millions of injections annually, making the choice of administration route critical for therapeutic success. The question of why many injections are given intramuscular (IM) instead of subcutaneous (SC) is foundational to pharmacology and hinges on the specific properties of the medication being delivered.

Some injections provide immediate relief, while others can last for months or even years. The question of **how long does the effect of an injection last** depends on a wide range of pharmacological factors, including the type of medication and how it is administered.