Relyvrio (formerly AMX0035) is an oral fixed-dose combination of sodium phenylbutyrate (PB) and taurursodiol (TURSO). PB is a prescription drug used to treat urea cycle disorders and TURSO (also known as tauroursodeoxycholic acid [TUDCA]) is a widely available non-prescription supplement. Relyvrio is indicated for the treatment of amyotrophic lateral sclerosis (ALS) in adults.
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