Question

A client receiving oral theophylline is due to have a theophylline level drawn. The nurse should question the client to ensure that the client has not ingested which substance before the blood sample is drawn?

1) Coffee
2) Oatmeal
3) Ginger ale
4) Bagel with cream cheese

Answer 1

The nurse should question the client to ensure they have not ingested coffee before the theophylline level is drawn.

Step-by-step explanation:

The nurse should question the client to ensure that they have not ingested coffee before the theophylline level is drawn. This is because caffeine, which is present in coffee, is a methylxanthine like theophylline. Both theophylline and caffeine share common pharmacological actions, including stimulating the central nervous system and relaxing bronchial muscle.