Sodium Phenylbutyrate 500mg is an oral metabolic therapy formulated to help remove excess ammonia from the body in inherited urea‑cycle and related metabolic disorders. By converting nitrogen waste into alternative excretion pathways, it supports protection of the central nervous system and helps reduce risks associated with hyperammonemia such as cognitive decline and neurological complications. Manufactured by Glenmark Pharmaceuticals, this prescription therapy is typically used alongside a protein‑restricted diet and individualized clinical monitoring.