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Leukotriene Modifiers | 마이메르시 MyMerci
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Leukotriene Modifiers

NCLEX Review Guide: Leukotriene Modifiers

Mechanism of Action & Classifications

Leukotriene Receptor Antagonists (LTRAs)

  • Montelukast (Singulair) and Zafirlukast (Accolate) block leukotriene receptors, preventing bronchoconstriction and inflammation. These medications are particularly effective for exercise-induced asthma and allergic rhinitis.
  • Zileuton (Zyflo) inhibits 5-lipoxygenase enzyme, blocking leukotriene synthesis at the source. This medication requires regular liver function monitoring due to hepatotoxicity risk.

Memory Aid: "MAZE"

Montelukast - Asthma maintenance
Zafirlukast - Exercise-induced prevention

Key Points

  • Used for asthma prophylaxis, NOT acute bronchospasm relief
  • Taken daily regardless of symptoms for optimal effectiveness
  • May take 2-4 weeks to achieve full therapeutic benefit

Administration & Patient Education

Dosing Guidelines

  1. Montelukast: Take once daily in evening, with or without food
  2. Zafirlukast: Take twice daily on empty stomach (1 hour before or 2 hours after meals)
  3. Zileuton: Take four times daily with meals and at bedtime

Clinical Scenario

A 16-year-old athlete reports wheezing during soccer practice. The provider prescribes montelukast. What key teaching points should the nurse emphasize?

  • Take medication daily, even on non-exercise days
  • Continue using rescue inhaler for acute symptoms
  • Report mood changes or suicidal thoughts immediately

Adverse Effects & Monitoring

Common Side Effects

  • Headache, dizziness, and gastrointestinal upset are most frequently reported. Neuropsychiatric effects including mood changes, depression, and suicidal ideation require immediate discontinuation and provider notification.
  • Zileuton specifically can cause elevated liver enzymes, requiring baseline and periodic ALT monitoring every 2-3 months initially, then periodically thereafter.

Drug-Specific Monitoring

MedicationKey MonitoringFrequency
MontelukastNeuropsychiatric symptomsOngoing assessment
ZafirlukastDrug interactions (warfarin)INR monitoring if applicable
ZileutonLiver function testsBaseline, then q2-3 months

Commonly Confused Points

Leukotriene Modifiers vs. Other Asthma Medications

AspectLeukotriene ModifiersBeta-2 AgonistsCorticosteroids
UseProphylaxis onlyAcute relief + preventionAnti-inflammatory
Onset2-4 weeksMinutesDays to weeks
AdministrationOral, dailyInhaled, PRN or scheduledInhaled, daily

Common Pitfalls

  • Students often confuse these as rescue medications - they are MAINTENANCE only
  • Missing the neuropsychiatric side effect warnings, especially in adolescents
  • Forgetting that zafirlukast must be taken on empty stomach

Study Tips & Memory Aids

NCLEX Success Strategies

  • "Leukotriene = Long-term" - Always for prevention, never acute treatment
  • "Singular Evening" - Montelukast (Singulair) taken once in evening
  • "Zap Empty" - Zafirlukast on empty stomach
  • "Zileuton = Liver" - Only one requiring liver monitoring

Quick Check Questions

  • □ Can leukotriene modifiers be used for acute asthma attacks? (No)
  • □ Which leukotriene modifier requires liver monitoring? (Zileuton)
  • □ What serious side effect requires immediate discontinuation? (Neuropsychiatric symptoms)
  • □ How long until full therapeutic effect? (2-4 weeks)

Remember: You're building the foundation for safe, competent nursing practice. Every concept you master brings you closer to protecting your future patients. Stay focused and trust your preparation!

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