Your Side Effects May IncludeChantix side effects
varenicline
This side effect is printed on the FDA label for Chantix. It was a question in our daily quiz, where you pick the real side effect from four choices.
Vivid, strange dreams
People trying to quit report dreams so vivid the label warns you about them.
“Inform patients that they may experience vivid, unusual or strange dreams during treatment with CHANTIX.”
Stop and call your doctor if you notice changes in mood or behavior, like agitation or depression.
10,713 reports to the FDA's adverse event system mention abnormal dreams or nightmares. A report is not proof the drug caused it. See the query
From quiz No. 3 · September 27, 2026 · Play that quiz →
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Not medical advice. Don't stop or start a medication because of a quiz. Talk to your doctor or pharmacist. Label text and report counts from openFDA. Not affiliated with any drug maker.