What is tesamorelin?

A medicine with a specific job

Tesamorelin copies a hormone made in the brain. A hormone is a chemical message that tells another part of the body what to do.

Tiny chemical building blocks link into a short chain called a peptide. Tesamorelin is made from this kind of chain.

The word peptide describes what a substance is made of; it does not settle its legal status or its risks.

For tesamorelin, begin with the named medicine and the reason for treatment. A broad phrase such as peptide care leaves both questions open.

How it works in the body

A gland is a body part that makes and releases substances. The pituitary makes hormones, the chemical messages between body parts.

Tesamorelin tells a gland called the pituitary to release more growth hormone. Growth hormone helps build tissue, the material in muscles and other body parts. It also helps the body break down fat. Tesamorelin is a different substance.

IGF-1 is a substance in the blood that tells the body's cells to grow. Tesamorelin raises its level, so the label calls for blood tests to measure how high it gets.

Ask which blood tests are planned and how the results would affect your care. You can ask that question without studying chemistry.

Know the names on the product

The labels name the versions as tesamorelin (EGRIFTA SV and EGRIFTA WR), as of September 28, 2026.

The label says these versions are prepared differently and cannot be swapped for each other.

Ask which version is being discussed, and keep that exact name in your notes.