Definity manufacturer and composition?

What is Definity’s active ingredient and what is it made of?

Definity is an ultrasound contrast agent. Its active ingredient is perflutren (a perfluorocarbon gas), formulated as a lipid-shelled microbubble suspension for intravenous use. The manufacturer provides Definity in a vial containing a concentrated suspension that is prepared for injection according to the product labeling.

Who manufactures Definity?

Definity is manufactured by Lantheus (the brand is associated with Lantheus, which supplies the product in the United States).

How is Definity’s composition different from other ultrasound contrast agents?

Definity’s defining composition is perflutren microbubbles stabilized by a lipid shell. Other commonly used ultrasound contrast products use different active perfluorocarbon gases and/or different stabilizing shell compositions, so the “microbubble makeup” is not the same across brands.

What do people usually mean by “composition” for Definity?

When users ask about Definity’s composition, they often want either:
- The active substance (perflutren), and
- The microbubble carrier/stabilizers (the lipid shell system described on the prescribing information).

If you tell me whether you need the composition at the level of exact excipients (all listed components in the vial), I can narrow it to what’s specifically listed on the labeling.