Question

a client recently began taking theophylline for treatment of asthma. which changes in the clients lifestyle would suggest that the client understands proper use of the drug and management of the disease?

limiting fluid intake to one liter a day
increasing dietary intake of b vitamins
sleeping eight hours each night
avoiding caffeine

Explanation:

Analyze the mechanism of theophylline

Theophylline is a methylxanthine bronchodilator used in Asthma Management to relax bronchial smooth muscle. Because it belongs to the same chemical class as caffeine (methylxanthines), it shares similar physiological effects, such as central nervous system stimulation and cardiac excitation.

Evaluate drug-diet interactions

Caffeine and theophylline have additive toxic effects. Consuming caffeine while taking theophylline can significantly increase the risk of adverse reactions, including tachycardia, palpitations, arrhythmias, tremors, and severe anxiety. Therefore, avoiding caffeine is a crucial lifestyle modification.

Assess the remaining options

• Limiting fluid intake is incorrect; patients with asthma are encouraged to maintain adequate hydration to help liquefy and mobilize airway secretions.
• Increasing B vitamins has no direct clinical relevance to theophylline metabolism or safety.
• While adequate sleep is beneficial for general health, it does not specifically demonstrate understanding of theophylline's narrow therapeutic index or its unique safety profile.

Answer:

• (A) Limiting fluid intake to one liter a day
• (B) Increasing dietary intake of B vitamins
• (C) Sleeping eight hours each night
• (D) Avoiding caffeine (Correct answer)