Answer
No. It is preventive treatment and does not act quickly enough for a sudden attack. Use the prescribed reliever and follow the asthma action plan.
Sources for this answer
- Asmanex Twisthaler 400 micrograms Inhalation Powder — 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.