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
  • Muscle Problems That Cause Abnormal Movement
  • 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

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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.