US FDA Inconsistency? Leucovorin’s Magnitude Of Effect Rewarded, Idebenone Needs New Trial

 

The FDA’s contrasting decisions on leucovorin and idebenone reveal a tightening regulatory stance where only therapies showing strong mechanistic rationale and large, credible treatment effects can overcome the limitations of nontraditional evidence sources.

US FDA’s CNPV Approvals Ride RTOR Pilot’s Coattails

 

The US FDA Commissioner's National Priority Voucher program is speeding clearance of products advancing agency priorities, but are recent quick approvals more attributable to the Real-Time Oncology Review (RTOR) program?

March Mildness: Familiar Faces And Standard Reviews On US FDA’s Scorecard

 

March's FDA user fee calendar is defined more by repeated review cycles and regulatory recalibration than breakthrough innovation, signaling a cautious start to 2026’s novel approval momentum.

US FDA Refuse-To-File Letters Hit The Big Time With Moderna’s Flu Vaccine

 

Moderna’s mRNA-1010 is an outlier among RTF recipients, which are dominated by rare disease and neuroscience candidates, such as Axsome’s fibromyalgia drug and Neuvivo’s ALS immunotherapy.


US FDA’s Bitopertin CRL Shows CNPV Cannot Overcome Surrogate Endpoint Woes

 

Disc Medicine's bitopertin, the first novel agent with an FDA Commissioner's National Priority Voucher to complete a review, failed to show biomarker endpoint was associated with clinical benefit, the complete response letter states.

PTC Withdraws Translarna US FDA Filing

 
• By 

PTC apparently has accepted defeat after 12 years trying to gain US approval of its DMD drug, which included a complete response and two refuse-to-file letters.

Cardio-Renal-Metabolic Drugs Face World Made By GLP-1s, Juiced By National Priority Vouchers

 

Obesity will continue dominating the cadiovascular, renal and metabolic field in 2026, but the US FDA's Commissioner's National Priority Voucher program could disrupt the user fee calendar throughout the vast sector.

Public Complete Responses: US FDA Revised Corcept’s Letter To Fix Clarity, Not Facts

 

The unusual revision of Corcept’s complete response letter suggests the FDA may be writing for a different audience now that unapproved product CRLs are being made public.


Review Consistency, Not Quantity, US FDA’s Biggest Challenge With 2026 Novel Agents

 

Internal stress could break the FDA's streak of consistently high novel agent approval counts, despite beginning 2026 with almost as many goal dates as the past three years even though biologics center submissions plunged.

US FDA’s 2026 Lineup Of Novel Approval Candidates

 

The FDA starts 2026 with 55 novel agents under review, which are detailed in Pink Sheet's interactive chart.

Average Metrics In A Turbulent Year: US FDA’s 2025 Median Review Times Match PDUFA Goals

 

Review times for novel agents approved in 2025 stayed remarkably steady, hugging PDUFA timelines, maintaining high approval volumes, and foreshadowing a new debate over whether ultra‑fast, politically driven reviews will result from the Commissioner's National Priority Voucher program.

It’s About Time: US FDA’s Review Speed For Novel Approvals In 2025

 

Interactive infographic tracking submission to approval for all 58 novel agents approved by US FDA in 2025


US FDA’s Novel Neuroscience Approvals Plunged In 2025, But 2026 Candidates Are Coming

 

More complete response letters were issued than approvals for novel neuroscience candidates in 2025. Orphan neurology therapies were hit the hardest.

A Closer Look At US FDA’s 58 Novel Approvals In 2025

 

Pink Sheet's annual listing of novel agents and the review designations they carried

US FDA Holds Steady With 58 Novel Approvals In 2025 Despite Upheaval

 

While the volume of applications was one of the highest in the decade, a high rate of complete response letters winnowed the pool to an approval total near the 10-year average of 56. The approval total for 2025 is very close to the 61 new molecular entities and novel biologics approved in 2024.

Doing More With Less: Saol Hopes To Evade New SL1009 Trial With Range Of New Analyses

 

Saol Therapeutics cannot conduct a new clinical trial of SL1009 in ultra-rare mitochondrial disorder, but aims to answer the FDA's complete response letter with new looks at available data.


US FDA’s December User Fee Goals Look Hot-Blooded And Cancer-Free

 

Non-malignant hematology, respiratory and cardiometabolic candidates make up for an unusual lack of oncology products on the US FDA’s December user fee goal calendar.

Single Trial Success Stories: UCB’s Kygevvi Joins US FDA Approvals With Confirmatory Evidence

 

The orphan drug share of US FDA’s 2025 novel approvals is holding steady, with examples of approvals based on a single trial with confirmatory evidence from UCB, Precigen, Jazz Pharmaceuticals and Stealth Biotherapeutics

Do US FDA Complete Response Letters Suggest Turn To Less Flexibility In Rare Disease?

 

A cluster of CRLs for rare disease applications based on one trial plus confirmatory evidence may represent a shift away from the regulatory flexibility that had come to characterize ultra-rare drug development

Novel US FDA Approvals Could Heat Up November, But Will Annual Count Beat 2024?

 

Eight novel agents have user fee goal dates in November, which keeps the possibility of matching or topping the 2024 annual count alive.