Overview Open-Label Extension Study of Kuvan for Autism Status: Completed Trial end date: 2012-03-01 Target enrollment: Participant gender: Summary This is an open-label extension study available only to subjects who completed an earlier double-blind, placebo-controlled study of sapropterin in children with autism. Phase: Phase 2/Phase 3 Details Lead Sponsor: The Children's Health CouncilCollaborator: BioMarin PharmaceuticalTreatments: Verapamil