The following side effects may get better over time as your body gets used to the medication. Let your healthcare provider know immediately if you continue to experience these symptoms or if they worsen over time.
Common Side Effects
- Headache (13%)
Less Common Side Effects
- Nausea
- Vomiting
- Diarrhea
- Stomach pain
- General pain
- Muscle or back pain
- Dizziness
- Weakness
- Fever
- Infection
Zafirlukast serious side effects
Contact your healthcare provider immediately if you experience any of the following.
- Allergic reaction: trouble breathing; hives; rash; blisters on skin; swelling of your face, lips, or tongue
- Liver problems: upper right stomach pain, nausea, tiredness, flu-like symptoms, loss of appetite, yellowing of the skin or whites of your eyes
- Changes in mood: feeling down or hopeless, thoughts of harming yourself, trouble sleeping
- Symptoms related to high white blood cell levels: intense itching, rash, trouble breathing, worse breathing problems, tingling or numbness in hands or feet
Source: DailyMed
The following Zafirlukast side effects have also been reported
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.
