Varenicline Tablet Side Effects by Likelihood and Severity

COMMON side effects


If experienced, these tend to have a Less Severe expression

  • Abnormal Dreams
  • Constipation
  • Difficulty Sleeping
  • Gas
  • Headache
  • Nausea
  • Vomiting

INFREQUENT side effects


If experienced, these tend to have a Severe expression

  • Angina, A Type Of Chest Pain

If experienced, these tend to have a Less Severe expression

  • A Common Cold
  • A Feeling Of General Discomfort Called Malaise
  • A Skin Rash
  • Decreased Appetite
  • Drowsiness
  • Dry Mouth
  • Excessive Sweating
  • Gastroesophageal Reflux Disease
  • Generalized Weakness
  • Increased Hunger
  • Indigestion
  • Intense Abdominal Pain
  • Itching
  • Low Energy
  • Low Energy And Weakness
  • Nightmares
  • Runny Nose
  • Trouble Breathing

RARE side effects


If experienced, these tend to have a Severe expression

  • A Blood Clot
  • A Heart Attack
  • A Hypersensitivity Reaction To A Drug
  • A Skin Disorder With Blistering And Peeling Skin Called Stevens-Johnson Syndrome
  • A Stroke
  • A Transient Ischemic Attack, A Type Of Stroke That Lasts Only A Few Minutes
  • A Type Of Allergic Reaction Called Angioedema
  • Abnormal Heart Rhythm
  • Abnormal Liver Function Tests
  • Acute Inflammation Of The Pancreas
  • An Accidental Injury
  • Anemia
  • Diabetes
  • Erythema Multiforme, A Type Of Allergic Skin Reaction
  • High Blood Pressure
  • Manic Behavior
  • Mental Problems From Taking The Drug
  • Problems Metabolizing Alcohol
  • Seizures
  • Suicidal Behavior
  • Suicidal Thoughts
  • Thoughts Of Hurting Or Killing Others
  • Unconsciousness

If experienced, these tend to have a Less Severe expression

  • A Change In The Ability To Pay Attention
  • A Change In Vision
  • A Problem With Menstrual Periods
  • A Sleep Disorder
  • A Toothache
  • A Type Of Skin Condition With Redness And Itching Called Eczema
  • Acne
  • Aggressive Behavior
  • Agitation
  • Altered Interest In Having Sexual Intercourse
  • An Increased Need To Urinate Often
  • Anxious Feelings
  • Asthma
  • Backache
  • Behavioral Problems
  • Chest Pain
  • Cramps
  • Delusions
  • Depression
  • Diarrhea
  • Difficulty Concentrating
  • Dizziness
  • Drug-Induced Hot Flashes
  • Dry Skin
  • Excess Urination
  • Feelings Of Hostility
  • Flu-Like Symptoms
  • Hallucinations
  • Heart Throbbing Or Pounding
  • High Blood Sugar
  • Hives
  • Increased Sensitivity Of The Skin To The Sun
  • Inflammation Of The Nose Due To An Allergy
  • Joint Pain
  • Mood Changes
  • Muscle Pain
  • Nosebleed
  • Panic Disorder
  • Paranoia
  • Peripheral Vascular Disease
  • Psoriasis
  • Ringing In The Ears
  • Sensation Of Spinning Or Whirling
  • Sleepwalking
  • Swollen Lymph Nodes
  • Taste Impairment
  • Temporary Redness Of Face And Neck
  • The Inability To Have An Erection
  • Urination During The Night
  • Visible Water Retention
  • Weight Gain

Selected from data included with permission and copyrighted by First Databank, Inc. This copyrighted material has been downloaded from a licensed data provider and is not for distribution, except as may be authorized by the applicable terms of use.

CONDITIONS OF USE: The information in this database is intended to supplement, not substitute for, the expertise and judgment of healthcare professionals. The information is not intended to cover all possible uses, directions, precautions, drug interactions or adverse effects, nor should it be construed to indicate that use of a particular drug is safe, appropriate or effective for you or anyone else. A healthcare professional should be consulted before taking any drug, changing any diet or commencing or discontinuing any course of treatment.