Pharmacology Reproductive & Maternity Meds #5

Question

The nurse is reviewing the client’s theophylline blood level during a followup visit. Which level, in mcg/mL, is within the therapeutic range for theophylline?

Answers

  1. 1.2
    • Rationale:

      This answer is not correct because 1.2 mcg/mmL theophylline blood levels would indicate sub-therapeutic levels. The desired effects of opening airways and increased ease of breathing will not occur at this level.

  2. 3.5
    • Rationale:

      This answer is not correct because 3.5 mcg/mL theophylline blood levels would indicate sub-therapeutic levels. The desired effects of opening airways and increased ease of breathing will not occur at this level.

  3. 8.3
    • Rationale:

      This answer is not correct because 8.3 mcg/mL theophylline blood levels would indicate sub-therapeutic levels. The desired effects of opening airways and increased ease of breathing will not occur at this level.

  4. 10.6
    • Rationale:

      This answer is correct because 10.6 mcg/mL is within the 10-20 mcg/mL therapeutic level of theophylline. This level should be producing the desired effects of bronchodilation and increased ease of breathing for the client.

Overview

Theophylline’s therapeutic level is 10-20 mcg/mL.

Explanation

Learning Outcomes

Theophylline is a bronchodilator used in clients to treat conditions such as asthma and emphysema. The goal of treatment is to open the airways and promote ease of breathing. Theophylline has a narrow therapeutic range, 10-20 mcg/mL. Periodic blood tests should be performed to make sure the client is receiving enough theophylline to produce the desired effects, yet not too much to produce toxicity. Toxicity symptoms can occur when levels are > 20 mcg/mL and symptoms increase as blood levels are higher. Toxicity symptoms include insomnia, anxiousness, nausea, vomiting, and tremors. Symptoms can progress to generalized seizures which can progress to status epilepticus.

Test Taking Tip

Be sure to know therapeutic levels for major medications that have therapeutic levels, such as theophylline, digoxin, lithium, to name some of the top medications.

Video Rationale