Answer
Rarely, it can cause paradoxical bronchospasm immediately after inhalation. Stop using it and obtain urgent medical help if breathing suddenly worsens.
Sources for this answer
- Relvar Ellipta 184 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.