The nurse is teaching a patient who will begin taking oral theophylline (Theo-Dur) when discharged home from the hospital. What information will the nurse include when teaching the patient about this drug?
a. An extra dose should be taken when symptoms worsen.
b. Anorexia and gastrointestinal upset are unexpected side effects.
c. Avoid caffeine while taking this medication.
d. Food will decrease the amount of drug absorbed.
ANS: C
Caffeine and theophylline are both xanthine derivatives and should not be taken together because of the increased risk of toxicity and severe adverse effects. Theophylline has a narrow therapeutic range and must be dosed carefully; patients should never increase or decrease the dose without consulting their provider. Gastrointestinal symptoms are common side effects. Food slows absorption but does not prevent the full dose from being absorbed.
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