👤 By the CinnaRN Clinical Content Team🕐 Updated 2026-08-23🏷️ Pharmacological Therapies🔖 Free to read, print, and share
Also known as: Intal · cromolyn sodium · mast cell stabilizer
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Use this quick-reference guide to spot, treat, and prevent Cromolyn on the NCLEX. Keep it handy during review and on exam day!
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📒 The 1-minute cheat sheet
📌 Uses
Asthma & allergy prophylaxis
Stabilizes mast cells → no histamine
✅ Do
Use 15 min before exercise/trigger
Scheduled daily → full effect ~2-4 wk
📌 Avoid
NOT for acute attack → no rescue
🎓 Teach
Throat irritation, cough common
Gargle/sip water after dose
📚 Cromolyn — full study notes
The cheat sheet above is your quick recall card. These notes go deeper — what it is, what to do first, what must be reported, and what to teach.
Cromolyn is a mast cell stabilizer that prevents the release of histamine and other inflammatory mediators, used prophylactically for asthma and allergic rhinitis. It is a preventive controller drug and has NO effect on an acute attack. Effects build over time, so it must be used consistently.
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Key points
Understand these first
It is a prophylactic mast cell stabilizer that prevents, but does not relieve, bronchospasm.
Full benefit may take 2-4 weeks of regular use.
It can be taken before exercise or known allergen exposure to prevent symptoms.
It has a very favorable safety profile with minimal systemic side effects.
Common minor effects include throat irritation, cough, and bad taste.
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Nursing priorities
What to do, in order
Reinforce regular scheduled use rather than as-needed use.
Teach pre-dosing before exercise or anticipated allergen exposure.
Continue a separate rescue bronchodilator for acute symptoms.
Teach mouth rinsing or sipping water to ease throat irritation.
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Red flags — report now
Escalate immediately
Never rely on cromolyn to relieve an active asthma attack or acute bronchospasm.
Report worsening wheezing or difficulty breathing after a dose (possible bronchospasm).
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Patient teaching
What patients must know
Use it on a regular schedule; it may take a few weeks to work fully.
Take it before exercise or allergen exposure to prevent symptoms.
Keep your rescue inhaler for sudden attacks because this drug will not stop one.
❓ Cromolyn: NCLEX FAQs
What are the priority nursing interventions for Cromolyn?
Reinforce regular scheduled use rather than as-needed use. Teach pre-dosing before exercise or anticipated allergen exposure. Continue a separate rescue bronchodilator for acute symptoms. Teach mouth rinsing or sipping water to ease throat irritation.
What are the warning signs of Cromolyn a nurse must report?
Never rely on cromolyn to relieve an active asthma attack or acute bronchospasm. Report worsening wheezing or difficulty breathing after a dose (possible bronchospasm).
What do I need to know about Cromolyn for the NCLEX?
It is a prophylactic mast cell stabilizer that prevents, but does not relieve, bronchospasm. Full benefit may take 2-4 weeks of regular use. It can be taken before exercise or known allergen exposure to prevent symptoms. It has a very favorable safety profile with minimal systemic side effects.
What patient teaching is important for Cromolyn?
Use it on a regular schedule; it may take a few weeks to work fully. Take it before exercise or allergen exposure to prevent symptoms. Keep your rescue inhaler for sudden attacks because this drug will not stop one.
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Quick Tip
It is a prophylactic mast cell stabilizer that prevents, but does not relieve, bronchospasm.