Complete Response Letter for Aldeyra ADX-2191
FDA has issued a complete response letter to Aldeyra Therapeutics for its 505(b)(2) NDA for ADX-2191 (methotrexate for injection), an investigational drug candidate to treat primary vitreoretinal lymphoma (PVRL). A company statement says that while no safety or manufacturing issues were identified, the agency stated that there was a “lack of substantial evidence of effectiveness” due to “a lack of adequate and well-controlled investigations” in the literature-based NDA submission. The company says that based on prior discussions with FDA, it did not conduct any clinical trials of the drug for the proposed indication.
“While we appreciate FDA’s position with respect to providing evidence from adequate and controlled trials,” says Aldeyra CEO Todd Brady, “we do not currently believe that randomized clinical trials of ADX-2191 in PVRL, a rare and fatal cancer with no approved therapy, are feasible. Given the current shortage of methotrexate, the lack of approved therapy for PVRL, and the desire to avoid potential safety risks associated with ocular injection of compounded formulations, we look forward to discussing with FDA the potential for making ADX-2191 available to PVRL patients under an expanded access program.”
Aldeyra says ADX-2191 is also under development for the treatment of proliferative vitreoretinopathy and retinitis pigmentosa.