Eszopiclone may cause a severe allergic reaction. Stop taking eszopiclone and get emergency medical help if you have signs of an allergic reaction: hives; nausea, vomiting; difficulty breathing; swelling of your face, lips, tongue, or throat.
Some people using this medicine have engaged in activity while not fully awake and later had no memory of it. This may include walking, driving, or making phone calls. If this happens to you, stop taking eszopiclone and call your doctor right away.
Serious injury or death could occur if you walk or drive while you are not fully awake.
Call your doctor at once if you have:
anxiety, depression, aggression, agitation;
memory problems, unusual thoughts or behavior;
thoughts of hurting yourself; or
confusion, hallucinations (hearing or seeing things).
Common side effects may include:
day-time drowsiness, dizziness, "hangover" feeling;
headache, anxiety;
dry mouth;
unusual or unpleasant taste in your mouth;
rash; or
cold or flu symptoms such as fever, body aches, sore throat, cough, runny or stuffy nose.
This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
 Eszopiclone side effects (more detail)
