Several pipeline compounds are in development for once-weekly oral ART and IAS 2025 included several studies on ulonivirine (ULO, MK-8507) and islatravir (ISL).
Ulonivirine is a once-weekly NNRTI that retains activity against drug resistance to early NNRTIs (including K103N, Y181C and G190A) – with a resistance profile similar to doravirine. It is being developed as a partner to one-weekly islatravir and both compounds were put on development hold in 2021 due islatravir-induced reductions in lymphocyte and CD4 counts.
Source : HIV i-Base
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