Overview A Phase 3, Multicenter, Open-Label Extension Study of Phenoptin in Subjects With PKU Who Have Elevated Phenylalanine Levels Status: Completed Trial end date: 2006-06-01 Target enrollment: Participant gender: Summary The primary objective of this trial is to evaluate the safety and tolerability of long-term Phenoptin treatment in subjects with PKU. Phase: Phase 3 Details Lead Sponsor: BioMarin PharmaceuticalTreatments: Verapamil