Asthma Control Questionnaire (ACQ) algorithm and treatment steps

ACQ scoreTreatment adjustment
Level 1>1.5↑ 1 step
Level 20.75–1.5No change
Level 3<0.75↓ 1 step
Step 1Terbutalin as required
Step 2Budesonide 200 µg twice daily
Step 3Budesonide 400 µg twice daily
Step 4Budesonide 400 µg and formoterol 9 µg twice daily
Step 5Budesonide 800 µg and formoterol 18 µg twice daily