Sit up straight – try to keep calm. Do not lie down.
Take one puff of your reliever inhaler (usually blue) every 30-60 seconds, up to 10 puffs.
If you feel worse at any point OR you don’t feel better after 10 puffs call 999 for an ambulance.
If the ambulance has not arrived after 10 minutes and your symptoms are not improving, repeat step 2.
If your symptoms are no better after repeating step 2, and the ambulance has still not arrived, contact 999 again immediately.