Clearly frustrated by the U.S. FDA’s rejection of tradipitant to treat gastroparesis, Vanda Pharmaceuticals Inc. CEO Mihael Polymeropoulos said the agency is discouraging drug development for the serious gastric emptying condition for which there has been no new treatment in 40 years. The complete response letter (CRL) issued on the Sept. 18 PDUFA date for the neurokinin-1 receptor antagonist, which Vanda licensed from Eli Lilly and Co. in 2012, requested additional studies that the company said are not in line with the advice of experts in the field.

Speculation about potentially wider meaning among developers of psychedelic drugs was reignited after the complete response letter (CRL) from the U.S. FDA to Lykos Therapeutics Inc. for midomafetaminecapsules, which the company wants to use in combination with psychological intervention to treat post-traumatic stress disorder (PTSD). CEO Amy Emerson called the FDA move “deeply disappointing,” adding that San Jose, Calif.-based Lykos plans to request a meeting with the FDA to ask for reconsideration.

Two days before the PDUFA date, the U.S. FDA handed down a complete response letter (CRL) for Rocket Pharmaceuticals Inc.’s Kresladi (marnetegragene autotemcel), delaying potential approval of the lentiviral-based gene therapy as the first therapeutic option for leukocyte adhesion deficiency type I, a rare, inherited immune disorder. But the Cranbury, N.J.-based company has suggested that delay won’t be long, as the CRL requests only “limited” chemistry manufacturing and controls (CMC) information – additional CMC data were also cited as the reason for the three-month review extension earlier this year.