Zafirlukast (Accolate) is used to help control symptoms of asthma in people age 5 years and older. It's a tablet that you take by mouth two times every day. This medication helps improve lung function over time; it's not a rescue inhaler so it isn't used when you're having an asthma attack. The most common side effect of zafirlukast (Accolate) is headache. It's available as both a brand-name and generic medication.
Asthma (long-term treatment)
Zafirlukast (Accolate) is a leukotriene receptor antagonist. It blocks inflammatory chemicals in your body called leukotrienes from narrowing your airways and from making too much mucus in your lungs.
Source: DailyMed
Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.
Check with your doctor immediately if any of the following side effects occur:
Rare
Abdominal or stomach pain
clay-colored stools
dark urine
dizziness
headache
loss of appetite
rash
unpleasant breath odor
unusual tiredness or weakness
vomiting of blood
yellow eyes or skin
Incidence not known
Attack, assault, or force
attempts at killing oneself
discouragement
fear or nervousness
feeling sad or empty
fever with or without chills
general feeling of tiredness or weakness
hyperventilation
irregular heartbeats
irritability
lack of appetite
large, hive-like swelling on the face, eyelids, lips, tongue, throat, hands, legs, feet, or sex organs
loss of interest or pleasure
restlessness
seeing, hearing, or feeling things that are not there
shakiness in the legs, arms, hands, or feet
shortness of breath
sores, ulcers, or white spots on the lips or in the mouth
tiredness
trembling or shaking of the hands or feet
trouble with concentrating
trouble with sleeping
unable to sleep
unusual bleeding or bruising
Some side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:
Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional.
Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.
Helps control asthma symptoms in the long run
A tablet that's taken by mouth (not an inhaler)
Can use in children as young as 5 years old
Available in a lower-cost generic form
Not a first-choice option to help control asthma long-term
Taken twice a day
Must take at least 1 hour before or 2 hours after meals
Not recommended if you have liver problems
Always have your rescue inhaler with you at all times to help stop an asthma attack if it happens. Zafirlukast (Accolate) works to control your asthma over time; it doesn't help treat asthma attacks.
Take zafirlukast (Accolate) every day even if you don't have any asthma symptoms. This medication works to improve your overall lung function in the long run.
Take zafirlukast (Accolate) on an empty stomach at least 1 hour before or 2 hours after meals. Food can affect how much medication gets absorbed into your body, which can affect how well it works.
Don't change the dose or stop taking zafirlukast (Accolate) or any of your other asthma medications without talking to your provider first. Your asthma symptoms might come back if it's not controlled well enough.
Make sure to tell your provider and pharmacist about all the medications you're taking or planning to take. They can check for any potentially serious interactions with zafirlukast (Accolate) and adjust your medications to keep you safe.
Zafirlukast (Accolate) can cause some serious health issues. This risk may be even higher for certain groups. If this worries you, talk to your doctor or pharmacist about other options.
While zafirlukast (Accolate) can control your asthma in the long run, it can't stop an asthma attack that's happening. Make sure to always have your rescue inhaler with you at all times so you can use it when these attacks happen. Continue taking zafirlukast (Accolate) as instructed by your provider if you have an asthma attack.
Risk factors: History of liver problems
Though rare, some people taking zafirlukast (Accolate) have had liver damage. In most cases, signs and symptoms of liver damage went away when they stopped taking the medication. But in rare cases, liver damage worsened to life-threatening liver failure. Call your provider right away if you have upper right stomach pain, nausea, tiredness, yellowing of your skin or whites of the eyes, flu-like symptoms, or loss of appetite. These can be signs of liver damage.
Some people who take zafirlukast (Accolate) have reported getting depressed and having trouble sleeping. Let your provider know right away if you or your loved ones notice that you feel sad or hopeless, have lost interest in doing things that you usually enjoy, have trouble sleeping, or have other signs or symptoms of depression.
Risk factors: Stopping or lowering the dose of an oral corticosteroid medication
Very rarely, some people taking zafirlukast (Accolate) had symptoms related to high levels of white blood cells (eosinophilia). Symptoms can include intense itching, rash, worsened breathing problems, trouble breathing, tingling or numbness in hands or feet, and pain and swelling of your sinuses. They might be more likely to happen if you're stopping or lowering the dose of an oral corticosteroid medication while you're taking zafirlukast (Accolate). Tell your provider right away if you notice any of these symptoms during treatment.
Taking zafirlukast (Accolate) together with the blood thinner warfarin (Coumadin) can raise your risk of bleeding. Let the provider who's managing your blood thinner medication know that you're taking zafirlukast (Accolate). They'll follow up with you more often to check for your risk of bleeding and adjust your warfarin (Coumadin) dose accordingly.
Adults and children age 12 years or older: The typical dose is 20 mg by mouth twice a day.
Children ages 5 to 11 years old: The typical dose is 10 mg by mouth twice a day.
Using this medicine with any of the following medicines may cause an increased risk of certain side effects, but using both drugs may be the best treatment for you. If both medicines are prescribed together, your doctor may change the dose or how often you use one or both of the medicines.
Liver problems, including cirrhosis
Seasonal allergies
Year-round allergies
Asthma
Exercise-induced asthma
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Drugs and Lactation Database (LactMed). (2019). Zafirlukast. National Institute of Child Health and Human Development.
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Kovalszki, A., et al. (2016). Eosinophilia. Primary Care.
Scow, D. T., et al. (2007). Leukotriene inhibitors in the treatment of allergy and asthma. American Family Physician.
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