The nurse is planning education for a client newly prescribed theophylline. What information should the nurse plan to include? Select all that apply.

A. Stop taking theophylline if you begin smoking: While smoking significantly increases the metabolism of theophylline (requiring a dose increase to stay effective), the patient should never just stop the medication. Instead, they must notify their provider so the dosage can be adjusted. B. Theophylline should be taken every day: Theophylline is used for maintenance therapy in conditions like asthma or COPD. Consistent daily dosing helps maintain therapeutic serum levels and prevent exacerbations. C. Headaches may occur when taking theophylline: Headache is a common side effect due to central nervous system stimulation. Clients should be informed so they can recognize mild, expected reactions versus more serious adverse effects. D. Report palpitations to your healthcare provider: Theophylline can cause cardiac stimulation, including tachycardia or palpitations. Reporting these symptoms promptly helps prevent serious arrhythmias and allows for dosage adjustment if needed. E. If you forget your dose, take two the next day: Doubling the dose to make up for a missed one increases the risk of toxicity, including seizures or severe cardiac effects. Clients should take only the next scheduled dose as prescribed.