Praxis Precision Medicines, Inc. (NASDAQ: PRAX), a fully integrated, leading central nervous system (CNS) precision neuroscience biopharmaceutical company, today announced that the U.S. Food and Drug Administration (FDA) has granted BTD for elsunersen (PRAX-222), an antisense oligonucleotide (ASO) for the treatment of seizures associated with SCN2A Developmental and Epileptic Encephalopathy (SCN2A-DEE) caused by Gain of Function (GoF) variants in SCN2A.