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When should I call the doctor if I am taking Chantix?

Nina Evans
Pharmacy
Call your doctor if you're experiencing mood changes while taking Chantix (varenicline). Tell your doctor if you find yourself acting in an odd way, or you feel edgy, hostile or depressed. Tell your doctor immediately if you are having suicidal thoughts.

Call your doctor if you have serious side effects such as a fever, sore throat and headache, along with a severe blistering, peeling and red skin rash. And call your doctor if you are having less serious side effects like nausea, especially if they don't go away.

But if you're having a serious allergic reaction (hives, difficulty breathing, swelling of your face, lips, tongue, or throat), skip the phone call to your doctor and get immediate medical help: Call 911.
If you are taking Chantix (varenicline), call your doctor if you experience any of the following signs or symptoms:
  • fever or chills
  • bluish tint to the skin
  • mood swings, anxiety or nervousness
  • abnormal thoughts or suicidal thoughts
  • red skin lesions or peeling of skin
  • ulcers on the skin
  • severe acne
  • dizziness, drowsiness and an inability to concentrate
  • seizures     
Call 911 for:
  • a severe allergic reaction with cough, wheezing, chest constriction, skin itching
  • sudden swelling of the tongue, face, lips, throat or ear lobes

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.