Does this medication have side effects?
The following side effects are associated with Singulair Oral:
Common side effects:
| Abnormal Liver Function Tests | Severe |
| Head Pain | Less Severe |
Infrequent side effects:
| Nearsightedness | Severe |
| Bronchitis | Severe |
| Skin Infection | Severe |
| Inflammation of the Nose | Less Severe |
| Stuffy Nose | Less Severe |
| Toothache | Less Severe |
| Dizzy | Less Severe |
| Fever | Less Severe |
| Low Energy | Less Severe |
| Rash | Less Severe |
| Cough | Less Severe |
| Stomach Cramps | Less Severe |
| Infection of the Stomach and Intestines | Less Severe |
| Feeling Weak | Less Severe |
Rare side effects:
| Pink Eye | Severe |
| Chickenpox | Severe |
| Acute Infection of the Nose, Throat or Sinus | Severe |
| Sinus Irritation and Congestion | Severe |
| Pneumonia | Severe |
| The Flu | Severe |
| Skin Condition Marked by Red and Painful Nodules | Severe |
| Hives | Severe |
| Nosebleed | Severe |
| White Blood Cells in Urine in Response to Infection | Severe |
| Allergic Reaction caused by a Drug | Severe |
| Suicidal | Severe |
| Having Thoughts of Suicide | Severe |
| Feeling Restless | Less Severe |
| Depression | Less Severe |
| Aggressive Behavior | Less Severe |
| Middle Ear Infection | Less Severe |
| Abnormal Dreams | Less Severe |
| Sleepwalking | Less Severe |
| Throat Irritation | Less Severe |
| Inflammation of the Voice Box | Less Severe |
| Indigestion | Less Severe |
| Infection caused by a Virus | Less Severe |
| Eczema | Less Severe |
| Inflammation of Skin caused by an Allergy | Less Severe |
| Hallucination | Less Severe |
| Chronic Trouble Sleeping | Less Severe |
| Involuntary Quivering | Less Severe |
| Heart Throbbing or Pounding | Less Severe |
| Feel Like Throwing Up | Less Severe |
| Diarrhea | Less Severe |
| Nervous | Less Severe |
| Easily Angered or Annoyed | Less Severe |
| Anxious | Less Severe |
