Behandling med sapropterindihydrochlorid 10 mg/ kg daglig reducerede fenylalaninniveauet i blodet signifikant sammenlignet med placebo i 88 patienter med dårligt kontrolleret PKU og forhøjet fenylalaninniveau i blodet ved screening.
In 88 subjects with poorly controlled PKU who had elevated blood phenylalanine levels at screening, sapropterin dihydrochloride 10 mg/ kg/ day significantly reduced blood phenylalanine levels as compared to placebo.