Abstract
Argininosuccinate lyase deficiency (ASLD) is a urea cycle disorder (UCD) treated with dietary adjustment and nitrogen scavenging agents. "Pheburane(®)" is a new tasteless and odour-free formulation of sodium phenylbutyrate, indicated in the treatment of UCD.A male patient diagnosed with ASLD was put on treatment with the new formulation of sodium phenylbutyrate (granules) for a period of one year, at 500mg/kg orally in 3 intakes/day. Plasma glutamine, arginine, citrulline, argininosuccinate, serum sodium, potassium, liver function tests and urine orotate all remained unchanged over this period. There was no difference in mean ammonia levels before and after treatment, and no hyperammonemia episode occurred during treatment with Pheburane(®). An improvement in a measurement of quality of life (QOL) was noted after treatment with Pheburane(®). Good metabolic control and improved QOL were achieved throughout the treatment period.
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