Answer
Serevent Evohaler (salmeterol xinafoate) lists norflurane (HFA 134a), a hydrofluoroalkane (non-chlorofluorocarbon) propellant, as its excipient.
Sources for this answer
- Serevent EvohalerGlaxoSmithKline UK · emc · SmPC §6.1 List of excipients · Version 17Document updated
Sources checked