Does Perseris Require Refrigeration?
No, Perseris (risperidone extended-release injectable suspension) does not require a refrigeration cold chain for storage once prepared. Unopened kits must be stored at room temperature (20°C to 25°C, with excursions permitted to 15°C to 30°C). After mixing, the syringe is stable for up to 24 hours at room temperature and does not need refrigeration.[1][2]
How Is Perseris Supplied and Prepared?
Perseris comes as a single-use kit with risperidone powder and a polymer solution. A healthcare provider mixes it just before injection using a provided syringe. The process takes about 2 minutes and generates no residue. Administer within 24 hours of mixing; discard if unused.[1]
What Happens If Perseris Is Refrigerated?
Refrigeration is not recommended and may affect the suspension's stability or injection properties. Official labeling specifies room-temperature storage only, avoiding freezing or excessive heat.[1][2]
Perseris Storage vs. Other Long-Acting Injectables
Unlike some antipsychotics like Invega Hafyera (paliperidone), which requires refrigeration before first use, Perseris avoids cold chain logistics. This simplifies handling in clinics or pharmacies compared to Aristada (aripiprazole lauroxil), stable at room temp but with different mixing needs.[3]
Why Does Room-Temperature Stability Matter?
It reduces spoilage risks during transport or in resource-limited settings, cuts costs on cold chain equipment, and eases outpatient administration for schizophrenia patients on monthly dosing.[1]
[1]: Perseris Prescribing Information (Indivior)
[2]: Drugs.com - Perseris Storage
[3]: FDA Label Comparison - Long-Acting Injectables