Usage The Assess Asthma Control & Adjust Therapy tool can be used for patients currently taking asthma medication. Use the Classify Asthma Severity tool if:the patient's treatment plan is unknown or the patient is not taking asthma controller medications as prescribed for at least three months. . Summary The Expert Panel Report 3: Guidelines for the Diagnosis and Management of Asthma details how to assess asthma control and adjust asthma therapy in a patient taking asthma medication. The Assess Asthma Control & Adjust Therapy tool can be used for patients currently taking asthma medication.Use the Classify Asthma Severity tool if:the patient's treatment plan is unknown or the patient is not taking asthma controller medications as prescribed for at least three months. Assessing asthma level of control is based on the most severe impairment or risk category. Classification of Asthma Control (≥12 years of age and older)See Figure 4-7Classification of Asthma Control (5-11 years of age)See Figure 4-3bClassification of Asthma Control (0-4 years of age)See Figure 4-3a .