Lenacapavir, a twice-yearly injectable HIV-1 capsid inhibitor, has shown 100% efficacy in preventing HIV in women at a high risk for infection, according to an interim analysis of the phase 3 PURPOSE 1 trial.

The results were so promising that the independent data monitoring committee recommended that Gilead Sciences stop the blinded phase of the trial and offer open-label lenacapavir to all participants.

The results were both unexpected and exciting. “I’ve been in the HIV field for a really long time, and there’s no other phase 3 PrEP trial that found zero infections,” said Moupali Das, MD, PhD, executive director of clinical development at Gilead Sciences, Foster City, California.

Editor's Note: It would be nice if we knew anything about primary prophylaxis of bipolar disorder for high risk children.