What side effects may I notice from receiving Tizanidine?

Side effects that you should report to your doctor or health care professional as soon as possible:

-allergic reactions like skin rash, itching or hives, swelling of the face, lips, or tongue
-confusion
-hallucinations
-liver injury (dark yellow or brown urine; general ill feeling or flu-like symptoms; loss of appetite, right upper belly pain; unusually weak or tired, yellowing of the eyes or skin)
-loss of contact with reality
-low blood pressure (dizziness; feeling faint or lightheaded, falls; unusually weak or tired)
-trouble breathing
-slow or irregular heartbeat
Side effects that usually do not require medical attention (report to your doctor or health care professional if they continue or are bothersome):

-blurred vision
-constipation
-dizziness
-drowsiness
-dry mouth
-tiredness

This list may not describe all possible side effects for Tizanidine. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.