Impact of Clinical Response on Different Approved Doses in Japan and the United States

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 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 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.

Low-dose dutasteride (0.1 mg) is effective for hair growth, potentially more so than finasteride, with fewer side effects. East Asians may respond well to these treatments due to hair characteristics.

RU58841 lacks FDA approval due to financial and safety concerns, including potential cardiological side effects. The company abandoned further research, and users report adverse effects like heart palpitations and gynecomastia.

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.