What are you talking about, the side effects are so mild
Taken from their website on 12/26/2015
Chantix side effects
Abnormal Dreams
Chronic Trouble Sleeping
Feel Like Throwing Up
Gas
Head Pain
Incomplete or Infrequent Bowel Movements
Throwing Up
Angina
Trouble Breathing
Acute Infection of the Nose, Throat or Sinus
Condition in which Stomach Acid is Pushed Into the Esophagus
Drowsiness
Dry Mouth
Excessive Sweating
Feeling Weak
Increased Hunger
Indigestion
Itching
Loss of Appetite
Low Energy
Nightmares
Not Feeling Well
Rash
Runny Nose
Sluggishness
Stomach Cramps
Abnormal Heart Rhythm
Abnormal Liver Function Tests
Anemia
Anxious
Behaving with Excessive Cheerfulness and Activity
Chest Pain
Delusions
Depression
Diabetes
Erythema Multiforme
Giant Hives
Hallucination
Having Thoughts of Suicide
Heart Attack
High Blood Pressure
Injury
Mental Disorder with Loss of Normal Personality & Reality
Panic Disorder
Paranoia
Problems Metabolizing Alcohol
Seizures
Stevens-Johnson Syndrome
Stroke
Suicidal
Thoughts of Hurting or Killing Others
Transient Ischemic Attack
Unconscious
Aggressive Behavior
Backache
Cannot Focus Thoughts
Cramps
........
Disturbance of Attention
Dizzy
Excess Urination
Feeling Anger Toward Something
Feeling Restless
Flu-Like Symptoms
Heart Throbbing or Pounding
Hives
Joint Pain
Mood Changes
Muscle Pain
Nosebleed
Peripheral Vascular Disease
Problem Behavior
Problem with Periods
Problems with Eyesight
Reaction due to an Allergy
Ringing in the Ears
Sensation of Spinning or Whirling
Sleep Disorder
Swollen Lymph Nodes
Taste Problems
Temporary Redness of Face and Neck
Visible Water Retention
Weight Gain
Nausea, headache, vomiting, drowsiness, gas, constipation, trouble sleeping, unusual dreams, or changes in taste may occur. If any of these effects last or get worse, tell your doctor or pharmacist promptly.
Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.
Tell your doctor right away if you have any serious side effects, including: burning feeling in feet/toes, unusual pain in the legs when walking.
Stop taking varenicline and get medical help right away if you have any very serious side effects, including: seizure, symptoms of a heart attack (such as chest/jaw/left arm pain, shortness of breath, unusual sweating), signs of a stroke (such as weakness on one side of the body, trouble speaking, sudden vision changes, confusion).
A very serious allergic reaction to this drug is rare. However, get medical help right away if you notice any symptoms of a serious allergic reaction, including: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing.