Possible Side Effects

Side effects from Zanaflex can occur. Tell your doctor if any of these symptoms are severe or do not go away: dizziness, upset stomach, vomiting, tingling sensation in the arms, legs, hands, and feet, dry mouth, increased muscle spasms. If you experience either of the following symptoms, call your doctor immediately: yellowing of the skin or eyes, unexplained flu-like symptoms.

More Information

• If you experience any of the following serious side effects, stop taking tizanidine and seek emergency medical attention:


• an allergic reaction (difficulty breathing; closing of your throat; swelling of your lips, tongue, or face; or hives);


• hallucinations or abnormal behavior; or


• liver damage (yellowing of the skin or eyes, nausea, abdominal pain or discomfort, unusual bleeding or bruising, severe fatigue).


• Other, less serious side effects may be more likely to occur. Continue to take tizanidine and talk to your doctor if you experience


• drowsiness or dizziness;


• weakness;


• dry mouth;


• increased muscle tone or spasms; or


• sweating.


• Side effects other than those listed here may also occur. Talk to your doctor about any side effect that seems unusual or that is especially bothersome.