Pharmacology All of the following are true about theophylline except: A It acts by inhibiting phosphodiesterase enzyme B It is the drug of choice for exercise induced asthma C Therapeutic drug monitoring is needed for Theophylline D It is a CNS stimulant and can lead to seizures 💡 Explanation All of the following are true about theophylline except: ✓ Correct Answer: B. It is the drug of choice for exercise induced asthma