Compare Cromolyn vs. Singulair

Head-to-head comparisons of medication uses, side effects, ratings, and more.

Intal (Cromolyn)

Prescription or OTC

Singulair (Montelukast)

Prescription only
Relieves nasal allergy symptoms.

Intal (Cromolyn) is a good option to relieve nasal allergy symptoms when antihistamines aren't working. Good choice for pregnant women.

Prevents breathing problems.

Singulair (Montelukast) has fewer side effects but doesn't work as well as steroid inhalers for asthma. It also helps with allergies.

3.7/ 5 average rating with 557 reviewsforSingulair
Upsides
  • Treats nasal allergy symptoms.
  • Most people don't have many side effects since it works in the nose and doesn't affect the rest of your body.
  • It's a good option for pregnant women. Can also be used for kids 2 years and older.
  • Doesn't make you drowsy or dizzy.
  • No prescription is needed.
  • Prevents symptoms and improves lung function in children and adults with chronic asthma.
  • A single 10 mg dose improves exercise-induced asthma symptoms for up to 24 hours.
  • Fewer side effects compared to other asthma treatments.
  • Also relieves nasal allergy symptoms.
  • Effective pill alternative to corticosteroid inhalers.
Downsides
  • Needs to be used regularly for at least a week to see any good effects.
  • Can have an unpleasant smell or taste.
  • Can cause headaches, or burning and stinging in your nose.
  • You have to use Montelukast every day to control your symptoms.
  • Somewhat less effective than corticosteroid inhalers for asthma.
  • There's no generic available, so it can be expensive.
  • Can cause behavior changes, agitation, aggression, and difficulty sleeping for some people.
Used for
Dosage forms
  • Nasal spray
  • Pill
  • Chewable tablet
  • Granule
Price
Want to save even more money?
Sign up now for a 30-day trial and save up to 95% at CVS, Kroger, Albertsons, and other pharmacies.
Reviews
Not enough review data.Leave a review
557 reviews so far
66%
saidit'sworth it
47%
saiditworked well
14%
saidit'sa big hassle

Have you used Singulair (Montelukast)?

Leave a review
Side effects
The Intal (Cromolyn) FDA package insert doesn’t have numbers about how common side effects are.
14possible side effects
  • Headache
    18%
  • Influenza
    4%
  • Pain, abdominal
    3%
  • Cough
    3%
  • Asthenia/fatigue
    2%
  • Fever
    2%
  • Dyspepsia
    2%
  • Pain, dental
    2%
  • Gastroenteritis, infectious
    2%
  • Dizziness
    2%
  • Congestion, nasal
    2%
  • Rash
    2%
  • ALT increased
    2%
  • AST increased
    2%
See more detailed side effects
Risks and risk factors
No information currently available
  • Sudden onset of asthma
    • Exercise-induced asthma
    • Other environmental triggers
  • Aggression and agitation
  • Blood disorder (eosinophilia)
    • Recent treatment with corticosteroid medication
    • Lowering dose of corticosteroid medication
  • Brain damage from too much phenylalanine
    • History of phenylketonuria (PKU)
  • Liver damage
    • History of liver disease including hepatitis
    • history of alcohol use
    • Other medications that cause liver injury
See more detailed risks and warnings