Effexor XR Side Effects by Likelihood and Severity

COMMON side effects


If experienced, these tend to have a Severe expression

  • Blurred Vision
  • Disturbance In The Ability Of The Eye To Focus
  • Head Pain
  • Problems With Eyesight

If experienced, these tend to have a Less Severe expression

  • Chronic Trouble Sleeping
  • Constipation
  • Dizzy
  • Drowsiness
  • Dry Mouth
  • Excessive Sweating
  • Feel Like Throwing Up
  • Feeling Anxious
  • Feeling Weak
  • Inability To Have An Erection
  • Involuntary Quivering
  • Loss Of Appetite
  • Nervous
  • Numbness And Tingling
  • Problem With Ejaculation
  • Stomach Cramps
  • Taste Problems
  • Throwing Up

INFREQUENT side effects


If experienced, these tend to have a Severe expression

  • A Feeling Of Restlessness With Inability To Sit Still
  • Cannot Empty Bladder
  • Chest Pain
  • Confused
  • Depression
  • Fast Heartbeat
  • Feeling Agitated
  • Frequent Urination
  • High Blood Pressure
  • High Cholesterol
  • Itching
  • Rash
  • Ringing In The Ears
  • Sexual Problems

If experienced, these tend to have a Less Severe expression

  • Abnormal Dreams
  • Altered Interest In Having Sexual Intercourse
  • Bronchitis
  • Chills
  • Diarrhea
  • Easily Angered Or Annoyed
  • Feeling Anger Toward Something
  • Gas
  • Indigestion
  • Inflammation Or Infection Of Vagina
  • Migraine Headache
  • Neck Pain
  • Orgasm Problems
  • Sensation Of Spinning Or Whirling
  • Twitching
  • Visible Water Retention
  • Weight Gain
  • Weight Loss
  • Yawning

RARE side effects


If experienced, these tend to have a Severe expression

  • Abnormal Heart Electrical Signals
  • Abnormal Movements Of Face Muscles And Tongue
  • Altered Mental Status
  • Behaving With Excessive Cheerfulness And Activity
  • Bleeding Of The Stomach Or Intestines
  • Blood Pressure Drop Upon Standing
  • Decreased Blood Platelets
  • Deficiency Of Granulocytes A Type Of White Blood Cell
  • Difficult Or Painful Urination
  • Enlarged Prostate
  • Erythema Multiforme
  • Extrapyramidal Reaction
  • Fluid Retention In The Legs, Feet, Arms Or Hands
  • Giant Hives
  • Having Thoughts Of Suicide
  • Hemorrhage Of Blood Under The Skin
  • Hepatitis
  • Increased Pressure In The Eye
  • Increased Risk Of Bleeding
  • Interstitial Pneumonitis
  • Life Threatening Allergic Reaction
  • Lockjaw
  • Loss Of One's Own Sense Of Reality Or Identity
  • Low Amount Of Sodium In The Blood
  • Low Blood Counts Due To Bone Marrow Failure
  • Low Blood Sugar
  • Mild Degree Of Mania
  • Mood Changes
  • Neuroleptic Malignant Syndrome
  • Pancreatitis
  • Pneumonia With High Amount Of Eosinophil White Blood Cells
  • Prolonged QT Interval On EKG
  • Rhabdomyolysis
  • Secondary Angle-Closure Glaucoma
  • Seizures
  • Serotonin Syndrome - Adverse Drug Interaction
  • Sinus Irritation And Congestion
  • Stevens-Johnson Syndrome
  • Syndrome Of Inappropriate Antidiuretic Hormone Secretion
  • Toxic Epidermal Necrolysis
  • Trouble Breathing
  • Ventricular Fibrillation
  • Very Rapid Heartbeat - Torsades De Pointes

If experienced, these tend to have a Less Severe expression

  • Abnormal Increase In Muscle Tone
  • Abnormal Liver Function Tests
  • Abnormally Acute Hearing Or Painful Sensitivity To Sound
  • Abnormally Long Or Heavy Periods
  • Bleeding
  • Bleeding Not Related To Menstrual Period
  • Burping
  • Delirium
  • Dilated Pupil
  • Elevation Of Proteins In The Urine
  • Flu-Like Symptoms
  • Grinding Of The Teeth
  • Hair Loss
  • Heart Throbbing Or Pounding
  • Hives
  • Increased Prolactin In The Blood
  • Inflammation Of The Nose
  • Muscle Stiffness
  • Nosebleed
  • Painful Periods
  • Sun-Sensitive Skin
  • Temporary Redness Of Face And Neck
  • Uncoordinated
  • Widening Of Blood Vessels