What side effects may I notice from receiving Montelukast Sodium?

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

-allergic reactions like skin rash or hives, or swelling of the face, lips, or tongue
-breathing problems
-changes in emotions or moods
-confusion
-depressed mood
-fever or infection
-hallucinations
-joint pain
-painful lumps under the skin
-pain, tingling, numbness in the hands or feet
-redness, blistering, peeling, or loosening of the skin, including inside the mouth
-restlessness
-seizures
-sleep walking
-signs and symptoms of infection like fever; chills; cough; sore throat; flu-like illness
-signs and symptoms of liver injury like dark yellow or brown urine; general ill feeling or flu-like symptoms; light-colored stools; loss of appetite; nausea; right upper belly pain; unusually weak or tired; yellowing of the eyes or skin
-sinus pain or swelling
-stuttering
-suicidal thoughts or other mood changes
-tremors
-trouble sleeping
-uncontrolled muscle movements
-unusual bleeding or bruising
-vivid or bad dreams

Side effects that usually do not require medical attention (report to your doctor or health care professional if they continue or are bothersome):

-dizziness
-drowsiness
-headache
-runny nose
-stomach upset
-tiredness

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