Guidelines for the diagnosis and management of asthma. NIH Publication No. April 1997 Back to article Table 2. Do not use salmeterol as a rescue inhaler for symptom relief or for exacerbations. Due to wide interpatient variability in theophylline metabolic clearance, routine serum theophylline level monitoring is important.
Many factors can affect levels.
Expert Panel Report 2. Guidelines for the diagnosis and management of asthma. NIH Publication No. April 1997 Back to article Table 3. Expert Panel Report 2.