What is the shelf life of zomacton?

How long does Zomacton stay stable before use?

Zomacton is a growth hormone product supplied as a lyophilized powder in a dual-chamber cartridge. When kept in the refrigerator at 2–8 °C and protected from light, the unopened product remains stable until the expiration date printed on the carton and cartridge. The manufacturer does not provide a separate published shelf-life figure beyond that date.

What happens after you reconstitute it?

After reconstitution with the supplied diluent, Zomacton remains stable for 14 days when stored at 2–8 °C. During those 14 days you can draw doses into a syringe and use them for daily injections. If any reconstituted solution develops cloudiness or particles, it should be discarded immediately.

What causes the product to lose stability?

Temperature excursions above 8 °C, light exposure, and improper reconstitution can shorten the usable life. The dual-chamber cartridge design minimizes handling steps and helps maintain sterility, but still requires strict refrigeration both before and after reconstitution. Freezing the product or diluent does not recommended because it may affect the growth hormone molecule.

Are there any competing products that have longer shelf life after reconstitution?

Some competing growth hormone preparations allow 21 or 28 days of refrigerated storage after reconstitution, while Zomacton’s 14-day window is standard for many somatropin formulations.