Pharmacology and the Nursing Process by Linda Lane Lilley: Practice Exam

What is the optimal therapeutic range for theophylline blood level suggested by most prescribers now?

1. 10 to 20 mcg/mL

2. 5 to 15 mcg/mL

3. 20 to 30 mcg/mL

4. 0 to 5 mcg/mL

The correct answer is: 5 to 15 mcg/mL

The optimal therapeutic range for theophylline blood level is suggested to be between 5 to 15 mcg/mL by most prescribers because this range has been found to be effective and safe for treating respiratory conditions. Option A (10 to 20 mcg/mL) may be considered too high, leading to potential side effects such as tachycardia, while option C (20 to 30 mcg/mL) may increase the risk of toxicity. Option D (0 to 5 mcg/mL) is not a recommended range as it is below therapeutic levels and would not be effective in treating respiratory conditions.