Aminohippurate Sodium Pah Recall
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Estimation of effective renal plasma flow.
Measurement of the functional capacity of the renal tubular secretory mechanism.
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Aminohippurate sodium1 is an agent to measure effective renal plasma flow (ERPF). It is the sodium salt of para-aminohippuric acid, commonly abbreviated “PAH”. It is water soluble, lipid-insoluble, and has a pKa of 3.83. The empirical formula of the anhydrous salt is C9H9N2NaO3 and its structural formula is:
It is provided as a sterile, non-preserved 20 percent aqueous solution for injection, with a pH of 6.7 to 7.6. Each 10 mL contains: Aminohippurate sodium 2 g. Inactive ingredients: Sodium hydroxide to adjust pH, water for injection, q.s.
Formerly referred to as Sodium para-Aminohippurate.