✅ Product Benefits

• Leukotriene receptor antagonist: Blocks cysteinyl leukotriene CysLT₁ receptors, reducing airway inflammation, edema, bronchoconstriction, and mucus secretion—key for asthma and allergic rhinitis control 

• Versatile use cases:

  • Asthma maintenance: Helps prevent chronic asthma symptoms.

  • Exercise-induced bronchospasm prevention: Take at least 2 hours before exercise for protection.

  • Allergic rhinitis management (seasonal or perennial) with once-daily dosing .

• Convenient dosing: Single tablet once daily, typically in the evening; may be taken with or without food. No renal dose adjustment required for mild-to-moderate impairment .

• Well tolerated in most users: Common side effects include headache, abdominal discomfort, diarrhea, fever, nausea, vomiting, and upper respiratory infection symptoms. Rare but serious adverse events include liver dysfunction, Churg–Strauss syndrome, neuropsychiatric symptoms, and allergic reactions .

ℹ️ Precautions & Safety Notes

• Not for acute asthma attack relief: It’s not effective for immediate symptom relief—use rescue inhalers as needed .

• Neuropsychiatric risks: Boxed warning from FDA highlights risk of agitation, aggression, anxiety, depression, suicidal thoughts/behaviour, nightmares, hallucinations, sleep disturbances, and memory issues. Many users on Reddit reported vivid nightmares, mood changes, and in rare cases suicidal thoughts—all resolved after stopping montelukast .

  “Nightmares are horrible… waking up… terrified to go to bed” 
  “I feel like taking this medication has made my mental state decline rapidly and I've been experiencing suicidal ideation…” 

• Possible liver effects: Liver enzyme elevations are usually mild and reversible within 1–4 months, but monitor if symptoms arise .

• Interactions: Plasma levels may be reduced by CYP450 inducers like phenobarbital, phenytoin, or rifampicin; no significant interactions with many common meds like theophylline, warfarin, digoxin, etc. No food interaction concerns observed .

• Use with caution in special populations: Safety in pregnancy/breastfeeding not fully established; montelukast is excreted in breast milk. Only use if essential and under doctor’s supervision .

• Rare risks: Include Churg–Strauss syndrome, anaphylaxis, aggressive behavior, hallucination, memory loss, tremor, eosinophilic conditions