Drug Repurposing: Clinical Practices and Regulatory Pathways

The FDA will now require only one clinical trial for drug approval, potentially speeding up the release of hair loss treatments like PP405. Pelage is expected to present full results of PP405 Phase 2a trials and move to Phase III in mid-2026.

The FDA policy change may speed up approval for hair loss drugs like PP405, VDPHL-01, and Breezula by potentially eliminating the need for a second confirmatory Phase 3 trial. Approval timelines could be as early as 2028 for some treatments if Phase 3 results are strong.

The trial for TDM-105795 has been completed, and it was in phase 2A. The discussion seeks input on the next phases, 2B or 3, based on safety and efficacy.

The conversation discusses potential hair loss treatments, including clascoterone, GT20029, ET-02, VDPHL01, and PP405, with hopes for new options by 2028. Current treatments like minoxidil and finasteride are expected to remain effective, with clascoterone and VDPHL01 as promising alternatives.

The conversation discusses the safety study of PP405, emphasizing that early trials focus on safety rather than efficacy, and that any efficacy data from such a short study should be viewed skeptically. It also highlights that the information released is primarily for securing funding, and that meaningful efficacy results are expected in later phases.

Clascoterone's European release is expected in Q4 2026, with FDA approval anticipated by mid-2027. The discussion includes questions about the approval timeline and potential acceleration due to unmet needs.