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
- Sinus inflammation (7%)
- Nausea (5%)
- Pain in the throat area (5%)
*Side effects for extended-release tablets
Zileuton ER serious side effects
Contact your healthcare provider immediately if you experience any of the following.
- Liver problems
Source: DailyMed
The following Zileuton ER side effects have also been reported
Side effects that you should report to your care team as soon as possible:
- Allergic reactions—skin rash, itching, hives, swelling of the face, lips, tongue, or throat
- Liver injury—right upper belly pain, loss of appetite, nausea, light-colored stool, dark yellow or brown urine, yellowing skin or eyes, unusual weakness or fatigue
- Mood and behavior changes—anxiety, nervousness, confusion, hallucinations, irritability, hostility, thoughts of suicide or self-harm, worsening mood, feelings of depression
Side effects that usually do not require medical attention (report these to your care team if they continue or are bothersome):
- Headache
- Muscle pain
- Nausea
- Upset stomach
