The Weekly

Rare disease biotech stocks pop on the news that Vinay Prasad, the FDA’s chief biologics regulator, will depart the FDA at the end of April; Sen. Ron Johnson launches an investigation into recent rare disease drug rejections; and Roche and Zealand’s amylin analog fails to match investor expectations—and Eli Lilly’s rival candidate—in a mid-stage trial.

UniQure and REGENXBIO are both dealing with FDA setbacks for their respective gene therapies, as regulatory experts question the FDA’s decision-making processes; CBER director Vinay Prasad is under probe for allegedly fostering a toxic workplace; Sarepta CEO Doug Ingram is stepping down after several years of tumult at the top of the muscular dystrophy–focused company; and Eli Lilly again tops Novo Nordisk in a weight loss trial.

Eli Lilly notches another win over Novo Nordisk, as Zepbound bests CagriSema in a head-to-head trial sponsored by Novo; The FDA kicked off Rare Disease Week, providing draft guidance on its new plausible mechanism pathway, while a bipartisan senate hearing on Thursday will focus on the authorization process for rare conditions; Another leadership change shakes up CDC; and Gilead acquires CAR T partner Arcellx for nearly $8 billion.

Corsera Health’s Chief Operating Officer Rena Denoncourt and CFO Meredith Kaya speak with BioSpace about the biotech’s mission and vision for the next generation of cardiovascular care.

The FDA outright refuses to review Moderna’s mRNA-based flu vaccine as CBER director Vinay Prasad’s conduct is scrutinized; Disc Medicine receives an unexpected rejection, which Prasad may also have had a hand in; Compass Pathways posts new late-stage data on its psilocybin-based depression drug; CDC is once again leaderless.

Johns Hopkins’ Thomas Hartung discusses how drug discovery and development will change under evolving regulatory policies that embrace AI technology as well as organoid and other non-animal models of human biology.

A lawsuit and FDA warning ensued after Hims & Hers launched a compounded version of Novo Nordisk’s new obesity pill, more Big Pharma report earnings—including from weight loss rivals Novo and Eli Lilly—and the gene therapy space sees another rejection.

Pfizer announces the first data from its Metsera-acquired pipeline just ahead of its earnings call, where analysts pressed execs for more details; Merck and Roche also released Q4 and full year earnings, with Eli Lilly, Novo Nordisk and others reporting Wednesday; REGENXBIO hits a regulatory snag ahead of its upcoming PDUFA; more.

Roche’s obesity candidate achieves 22.5% weight loss in Phase II; Moderna pulls the plug on late-stage vaccine trials as Health Secretary Robert F. Kennedy’s anti-vaccine policies and rhetoric continues; and embattled gene therapy maker Sarepta announces new data in Duchenne muscular dystrophy.

The obesity market and Most Favored Nation drug pricing were among the topics de jour at the J.P. Morgan Healthcare Conference last week, while smaller biotechs sought to assure investors that their regulatory ducks are in a row; Novo Nordisk’s oral obesity pill got off to a hot start while the FDA delayed a decision on Eli Lilly’s investigational offering; and SpyGlass Pharma and AgomAb Therapeutics join the 2026 IPO club.