If a client's serum theophylline level is 16 mcg/mL, what should the nurse do initially?

In this scenario, the correct action in response to a serum theophylline level of 16 mcg/mL hinges on understanding the therapeutic range for theophylline, a medication commonly used for respiratory conditions such as asthma or chronic obstructive pulmonary disease (COPD). The therapeutic range for theophylline is typically between 10 to 20 mcg/mL.

When a patient's serum theophylline level falls within this range, it is considered to be at a therapeutic level. Therefore, documenting the normal value on the chart is essential for record-keeping and continuity of care. This action confirms that the patient's theophylline level is currently effective and that there is no immediate need for intervention.

Options that involve notifying the physician or reassessing the patient could imply that there is a concern with the theophylline levels. However, since 16 mcg/mL is within the therapeutic range, there is no clinical reason to alert the physician immediately or to conduct further assessments at that moment. Administering more medication is also not warranted, as the existing level is already appropriate.

Hence, documenting this normal value accurately reflects the current status of the patient’s medication therapy.