Answer
No. It is not a rescue inhaler; sudden symptoms require the prescribed quick-acting reliever.
Sources for this answer
- Trelegy Ellipta 92 micrograms/55 micrograms/22 micrograms inhalation powder, pre-dispensed — Current selected SmPCemc · Summary of Product Characteristics
General medicine information. Follow the instructions for your own medicine and speak to a pharmacist or clinician about your individual circumstances.