Posted by On September 27, 2024 GE HealthCare announced that the U.S. Food and Drug Administration (FDA) has granted approval of Flyrcado™ (flurpiridaz F 18) injection, a first of its kind positron emission tomography myocardial perfusion imaging (PET MPI) agent, for the detection of coronary artery disease (CAD). Indicated for patients with known or suspected CAD, Flyrcado delivers higher diagnostic efficacy compared to single-photon emission computed tomography (SPECT) MPI, the predominant procedure used in nuclear cardiology today. Flyrcado, which can be manufactured in an offsite pharmacy and delivered as a ready-to-use unit dose, has the potential to expand clinician and patient access to PET MPI, including improving diagnostic accuracy in difficult-to-image patients such as those with a high body mass index (BMI) and women.
FLYRCADO is a sterile, preservative-free, non-pyrogenic, clear, colorless to yellow radioactive solution. Each mL contains 190 MBq to 2,050 MBq (5 mCi to 55 mCi) of flurpiridaz F 18 at end of synthesis, up to 2.3 mcg flurpiridaz, and the following inactive ingredients: 45 mg hydroxypropyl-β-cyclodextrin (as a solubilizer and co-radiostabilizer), 35 mg L-(+)-ascorbic acid (as a radiostabilizer), 8.2 mg sodium hydroxide, and 55.2 mg anhydrous ethanol, in water for injection. The pH of the solution is between 5.5 and 8.
Deeper insight into the surprising radiostabilizer function is found in the corresponding patent application (https://patents.google.com/patent/WO2021078814A1/en), however, the mechanism is undisclosed. My guess is that HPBCD prevents the loss of activity by hindering the adsorption of the radiolabeled drug onto the container wall.
https://www.accessdata.fda.gov/drugsatfda_docs/label/2024/215168s000lbl.pdf