Pharmacology All of the following statements regarding theophylline are true except: A Increases cAMP B Inhibits phosphodiesterase C Increase in dose is required in smokers D Increase in dose is required in cardiopulmonary disease 💡 Explanation All of the following statements regarding theophylline are true except: ✓ Correct Answer: D. Increase in dose is required in cardiopulmonary disease