Fentanyl decreases blood oxygen more than furanylfentanyl despite similar effects on breathing.

Demery C, Moore SC, Kochan KE, Li M, Prince TD, Clements BM, Chen Z, Whitaker-Fornek JR, Levitt ES, Anand JP, Traynor JR.

Res Sq [Preprint]. 2026 Jan 12:rs.3.rs-8398857. doi: 10.21203/rs.3.rs-8398857/v1. PMID: 41646375; PMCID: PMC12869654.