Intramuscular injection
An injection delivered directly into muscle tissue, providing faster absorption than subcutaneous injection. Used for some peptides when deeper tissue penetration or more rapid onset is desired.
Frequently Asked Questions
What is Intramuscular injection?
Why is Intramuscular injection important in peptide research?
Related Terms
An injection into the fatty tissue layer between the skin and muscle. The most common administration route for peptides, typically using insulin syringes. Preferred for its slow, steady absorption and ease of self-administration.
Gauge (needle)A measurement of needle diameter — higher gauge numbers indicate thinner needles. Subcutaneous peptide injections typically use 27–31 gauge needles. Thinner needles reduce pain but draw liquid more slowly.
Injection site rotationThe practice of alternating injection locations (abdomen, thigh, upper arm, glute) to prevent lipodystrophy, scar tissue buildup, and localized irritation. Sites should be at least 1 inch apart.