Zafirlukast: Side Effects, Uses & Monitoring
Facts extracted from current FDA product labeling for Zafirlukast. Educational only — not medical advice.
Reported adverse reactions
| Reaction | Highest frequency reported* |
|---|---|
| Headache | 12.9% |
| Infection | 3.5% |
| Nausea | 3.1% |
| Diarrhea | 2.8% |
| Pain (generalized) | 1.9% |
| Asthenia | 1.8% |
| Abdominal pain | 1.8% |
| Accidental injury | 1.6% |
| Dizziness | 1.6% |
| Myalgia | 1.6% |
| Fever | 1.6% |
| Back pain | 1.5% |
| Vomiting | 1.5% |
| Sgpt elevation | 1.5% |
| Dyspepsia | 1.3% |
*Highest percentage across placebo-controlled trial tables summarized in current labeling.
Labeled uses
Zafirlukast is indicated for the prophylaxis and chronic treatment of asthma in adults and children 5 years of age and older.
Source: FDA labeling via NIH DailyMed (set baba507f…). Not affiliated with FDA or NIH.
Medical disclaimer: Always consult a qualified healthcare professional about any medication.
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