Compare Singulair vs. Foradil

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

Singulair
(montelukast)

Foradil
(formoterol)

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.Coming soon.
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Reviews & ratings
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5.07Singulair
Reviews for Singulair (montelukast)
66%
of people (All ages) say Singulair (montelukast) is worth it
47%
say it works well
14%
say it's a big hassle
557 reviews
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Have you used Foradil (formoterol)?
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Side effects
SingulairForadil
  • Sore throat 3%
  • Flu 3%
  • Fever 3%
  • Sinus inflammation 3%
  • Nausea 3%
  • Diarrhea 3%
  • Indigestion 3%
  • Otitis 3%
  • Viral infection 3%
  • Vocal cord inflammation 3%
More Singulair side effects »

We haven’t found good data for Foradil side effects.

FDA side effect reports for Foradil »
How it works
SingulairForadil
Singulair (Montelukast) is a leukotriene inhibitor. It lowers inflammation in your lungs and nasal passages to prevent asthma and relieve allergies.Coming soon.
Type of medication
SingulairForadil
Prescription only
Available as
SingulairForadil
  • Pill
  • Chewable tablet
  • Granule
  • Inhaler
Used for
SingulairForadil
  • Asthma Chronic Obstructive Pulmonary Disease Exercise Induced Asthma Prophylaxis
Risk factors for serious side effects
SingulairForadil
  • Exercise-induced asthma
  • Other environmental triggers
    • Recent treatment with corticosteroid medication
    • Lowering dose of corticosteroid medication
    • History of phenylketonuria (PKU)
    • History of liver disease including hepatitis
    • history of alcohol use
    • Other medications that cause liver injury
    Detailed Singulair (montelukast) risks & warnings »
    Coming soon.
    Pregnancy

    Research studies with animals haven’t found a risk to unborn babies, but it hasn’t been properly studied in humans.

    Research studies with animals found harmful effects on unborn babies. It hasn’t been properly studied in humans. The benefits might outweigh the risks even if you’re pregnant. Talk with your doctor.

    Food
    SingulairForadil
    • Singulair (Montelukast) contains aspartame (phenylalanine). People who have phenylketonuria (PKU) can't break down the amino acid phenylalanine. It builds up and causes serious medical problems. If you have PKU, don't use this product.
    No food related info.
    Kidneys and liver
    SingulairForadil
    • There are reports of liver injury in people taking Singulair (Montelukast) mostly in combination with other factors such as drugs, alcohol, and liver disease. If you have any of these risk factors, your doctor will need to check your liver function periodically.
    No kidneys and liver related info.
    Upsides and benefits
    SingulairForadil
    • 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.
    Coming soon
    Downsides and risks
    SingulairForadil
    • 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.
    Coming soon
    Tips from our pharmacists for people taking the medication
    SingulairForadil
    • Take it once a day to control asthma and allergy symptoms.
    • If you're using it for asthma or allergies, take it in the evening.
    • Use it 2 hours before exercising.
    • Granules can be taken by mouth or dissolved in liquid or soft food.
    • Doesn't treat sudden wheezing or asthma attacks once they start. Keep a fast-acting (rescue) inhaler with you.
    • The chewable tablets contain aspartame, so don't use them if you have a sensitivity to phenylalanine or phenylketones.
    Coming soon
    Learn more
    More about SingulairSide effectsReviews & ratingsAlternativesFDA package insert
    Have you used Singulair (montelukast)?
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    More about ForadilSide effectsReviews & ratingsFDA package insert
    Have you used Foradil (formoterol)?
    Worth itNot sureNot worth it