What is the dosing schedule for perseris injections?

How often do patients receive Perseris injections?

Perseris is given as a 90 mg or 120 mg subcutaneous injection once every month. The first two injections are administered in the abdomen; later injections can go in the abdomen or upper arm.

What happens if a patient misses a scheduled dose?

A missed injection should be given as soon as possible. If the gap exceeds one month, the prescriber may restart the two-injection loading phase or adjust the schedule to keep steady drug levels.

How is Perseris different from other risperidone long-acting injections?

Unlike Invega Sustenna, which is given monthly in the deltoid or gluteal muscle, Perseris is a subcutaneous abdominal or upper-arm injection that does not require oral risperidone supplementation after the first dose.

When does the Perseris patent expire?

The drug’s key U.S. patents are listed to expire in 2031, although ongoing litigation and potential pediatric exclusivity could shift that date. Updated patent and exclusivity data are available on DrugPatentWatch.com.

Who manufactures Perseris and are there approved generics?

Indivior manufactures Perseris. No therapeutically equivalent generic versions have been approved yet; any abbreviated new drug application would need to clear remaining patent and regulatory hurdles.