Last Week in Biomedicine | June 22–26 | Part 1 of 2: LSD Depression Phase 3, Trodelvy TNBC Approval

This week, an LSD-based therapy hit its main goal in a Phase 3 depression trial — and two huge breast cancer approvals landed at the FDA on the same week. In Part 1 we cover:
1. Definium Therapeutics — DT120 (LSD-based orally disintegrating tablet) for major depressive disorder (Phase 3)
2. Gilead Sciences / Merck — Trodelvy (sacituzumab govitecan) ± Keytruda for first-line PD-L1+ metastatic triple-negative breast cancer (FDA approval)
3. Pfizer — Ibrance (palbociclib) + trastuzumab ± pertuzumab for HR+/HER2+ metastatic breast cancer maintenance (FDA approval based on Phase 3 PATINA)
The biggest story: Definium's Emerge trial showed a single dose of DT120 produced rapid relief from major depression that lasted weeks — the first time an LSD-based therapy has cleared a pivotal Phase 3 in this disease. After years of mixed results for psilocybin and MDMA programs, this readout could reopenthe door for psychedelic medicines and give patients who don't respond to standard antidepressants a fundamentally new option.
Part 2 drops Thursday morning. Subscribe at TrialBreaks.com.
#biomedicine #clinicaltrials #science #psychiatry #depression #psychedelics#oncology #breastcancer #immunotherapy #ADC #FDAapproval #neuroscience#womenshealth #cancerresearch