After July’s first-ever release of more than 200 complete response letters (CRLs) by the U.S. FDA, the agency now says it will release letters shortly after sponsors receive them. In addition, the FDA released a new batch of 89 CRLs from 2024 to now that are tied to pending or withdrawn applications.
After Outlook Therapeutics Inc. took receipt of another complete response letter (CRL), Wall Street focused on the odds that the U.S. FDA will demand a new study with ONS-5010, or Lytenava (bevacizumab-vikg) against wet age-related macular degeneration (AMD).
It looks like Biogen Inc.’s Nrf2 activator, Skyclarys (omaveloxolone), will maintain its status as the sole therapy approved for treating patients with Friedreich’s ataxia (FA), at least for now. The U.S. FDA asked for another “adequate and well-controlled study” in the complete response letter (CRL) issued to PTC Therapeutics Inc. for 15-lipoxygenase inhibitor vatiquinone. The agency said “substantial evidence of efficacy was not demonstrated.”
A U.S. appeals court schooled the FDA as it handed Vanda Pharmaceuticals Inc. a “technical knockout” of sorts in yet another regulatory bout with the agency – this one over the FDA’s refusal to grant the company’s request for a hearing after it had received a complete response letter (CRL) for a jet lag supplemental indication for Hetlioz (tasimelteon).
Regeneron Pharmaceuticals Inc. disclosed within a positive second-quarter earnings report that it had received a complete response letter (CRL) two days earlier from the U.S. FDA for its bispecific antibody, odronextamab, for relapsed/refractory follicular lymphoma following two or more lines of systemic therapy.
There are a raft of problems the U.S. FDA wants resolved before Replimune Group Inc.’s BLA for RP-1 (vusolimogene oderparepvec) with nivolumab to treat advanced melanoma goes any further, all of which the company said are a surprise.
Manufacturing issues are the latest problem for Ultragenyx Pharmaceutical Inc. to solve after last week’s disappointment in a phase III study to treat brittle bones. The U.S. FDA gave the company a complete response letter (CRL) regarding the BLA for its gene therapy to treat Sanfilippo syndrome type A, saying it needs more details and improvements made about CMC after having finished manufacturing facility inspections.
Capricor Therapeutics Inc. received a complete response letter (CRL) from the U.S. FDA on the BLA for deramiocel to treat cardiomyopathy in Duchenne muscular dystrophy patients. The company’s CEO said the letter was unexpected.
It’s been more than seven years in coming, but the U.S. FDA is at last making public at least some of the complete response letters (CRLs) it’s sent to drug and biologic sponsors to notify them of deficiencies in their approval applications.
Developing a therapy for an ultra-rare condition has its challenges, including finding enough patients for clinical enrollment and convincing regulatory authorities that limited data prove the candidate is safe and effective. For that reason, Stealth Biotherapeutics Inc. has faced numerous roadblocks getting its mitochondria-targeting elamipretide across the finish line for Barth syndrome, a condition that affects about 230 to 250 males worldwide, including fewer than 150 in the U.S.
