A client's physician has prescribed theophylline (Theo-Dur) to help control the bronchospasm associated with the client's COPD. Instructions that should be given to the client include:

B Cigarette smoking may significantly increase the risk for theophylline toxicity. A Call your physician if you develop palpitations, dizziness, or restlessness. C Take this medication on an empty stomach. D Do not take your medicine if your pulse is less than 60 beats per minute.