What this phase means
Phase 4: the treatment is already approved. This study asks new questions — longer-term effects, other diseases, or how it compares in everyday care.
Phase labels are FDA/ICH categories applied to the registry Phase field. They are not a finding that this study succeeded.
What the registry says happens
If you join, the listed intervention(s) are Every 4-week long-acting injectable cabotegravir and rilpivirine, or Every 4-week long-acting injectable cabotegravir and rilpivirine. The registry lists allocation as randomized. Phase IV, multi-site, open-label, non-randomly assigned study of the pharmacokinetics (PK) of long-acting injectable cabotegravir and rilpivirine (CAB LA + RPV LA) during pregnancy and postpartum.
They plan to enroll about 40 people at 10 sites. Taking part typically means taking a study drug (or dummy pill) plus check-ins.
Official title (unrewritten)
Phase IV Study of the Pharmacokinetics of Long-Acting Injectable Cabotegravir and Rilpivirine in Pregnant and Postpartum Women With HIV in the United States
Interventions: Every 4-week long-acting injectable cabotegravir and rilpivirine, Every 4-week long-acting injectable cabotegravir and rilpivirine
Primary outcome (registry wording): Population PK: geometric mean clearance of CAB and RPV in second trimester, third trimester, and postpartum derived from a population PK model