Venlafaxine HCL ER Side Effects by Likelihood and Severity

COMMON side effects


If experienced, these tend to have a Severe expression

  • Disturbance In The Ability Of The Eye To Focus
  • Head Pain

If experienced, these tend to have a Less Severe expression

  • A Change In Vision
  • Anxious Feelings
  • Blurred Vision
  • Constipation
  • Decreased Appetite
  • Difficulty Sleeping
  • Dizziness
  • Drowsiness
  • Dry Mouth
  • Excessive Sweating
  • Generalized Weakness
  • Muscle Tremors
  • Nausea
  • Nervousness
  • Numbness And Tingling
  • Problems With Ejaculation
  • Taste Impairment
  • The Inability To Have An Erection
  • Vomiting

INFREQUENT side effects


If experienced, these tend to have a Severe expression

  • A Feeling Of Restlessness With Inability To Sit Still
  • Abnormal Sexual Function
  • An Inability To Completely Empty The Bladder
  • An Increased Need To Urinate Often
  • Chest Pain
  • Fast Heartbeat
  • High Blood Pressure
  • High Cholesterol
  • Itching

If experienced, these tend to have a Less Severe expression

  • A Migraine Headache
  • A Skin Rash
  • Abnormal Dreams
  • Agitation
  • Altered Interest In Having Sexual Intercourse
  • Bronchitis
  • Chills
  • Confusion
  • Diarrhea
  • Feelings Of Hostility
  • Gas
  • Indigestion
  • Inflammation Or Infection Of The Vagina
  • Irritability
  • Neck Pain
  • Orgasm Problems
  • Ringing In The Ears
  • 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

  • A Condition With Muscle Tissue Breakdown Called Rhabdomyolysis
  • A Disorder With Excess Antidiuretic Hormone Called Syndrome Of Inappropriate Antidiuretic Hormone
  • A Significant Type Of Allergic Reaction Called Anaphylaxis
  • A Skin Disorder With Blistering And Peeling Skin Called Stevens-Johnson Syndrome
  • A Skin Disorder With Blistering And Peeling Skin Called Toxic Epidermal Necrolysis
  • A Type Of Allergic Reaction Called Angioedema
  • A Type Of Inflammation Of The Lung Called Interstitial Pneumonitis
  • Abnormal Heart Electrical Signals
  • Abnormal Muscle Movements
  • An Increased Risk Of Bleeding
  • Bleeding Of The Stomach Or Intestines
  • Decreased Blood Platelets
  • Difficult Or Painful Urination
  • Erythema Multiforme, A Type Of Allergic Skin Reaction
  • Extrapyramidal Disease, A Type Of Movement Disorder
  • Fluid Retention In The Legs, Feet, Arms Or Hands
  • Increased Pressure In The Eye
  • Inflammation Of The Liver Called Hepatitis
  • Low Amount Of Sodium In The Blood
  • Low Blood Counts Due To Bone Marrow Failure
  • Low Blood Sugar
  • Manic Behavior
  • Mental Status Changes
  • Mood Changes
  • Neuroleptic Malignant Syndrome, A Reaction Characterized By Fever, Muscle Rigidity And Confusion
  • Orthostatic Hypotension, A Form Of Low Blood Pressure
  • Pancreatitis
  • Pneumonia With High Amount Of Eosinophil White Blood Cells
  • Prolonged QT Interval On EKG
  • Secondary Angle-Closure Glaucoma, A Type Of Eye Disorder
  • Seizures
  • Serotonin Syndrome, A Type Of Disorder With High Serotonin Levels
  • Suicidal Thoughts
  • Takotsubo Cardiomyopathy
  • Tardive Dyskinesia, A Disorder Characterized By Involuntary Movements Of The Face, Mouth And Tongue
  • Torsades De Pointes, A Type Of Abnormal Heart Rhythm
  • Trouble Breathing
  • Ventricular Fibrillation, A Heart Rhythm Disorder
  • Very Low Levels Of Granulocytes, A Type Of White Blood Cell

If experienced, these tend to have a Less Severe expression

  • A Form Of Mania That Has A Lower Severity Of Symptoms
  • A High Prolactin Level
  • Abnormal Liver Function Tests
  • Abnormally Acute Hearing Or Painful Sensitivity To Sound
  • Abnormally Long Or Heavy Periods
  • An Abnormal Increase In Muscle Tone
  • Bleeding
  • Bleeding Not Related To Menstrual Period
  • Bruising Under The Skin
  • Burping
  • Delirium
  • Depersonalization, A Disconnection Of One's Own Sense Of Reality Or Identity
  • Dilated Pupils
  • Elevation Of Proteins In The Urine
  • Flu-Like Symptoms
  • Grinding Of The Teeth
  • Hair Loss
  • Heart Throbbing Or Pounding
  • Hives
  • Increased Sensitivity Of The Skin To The Sun
  • Inflammation Of The Nose
  • Inflammation Of The Tissue Lining The Sinuses
  • Intense Abdominal Pain
  • Lockjaw
  • Loss Of Muscle Coordination
  • Muscle Stiffness
  • Nosebleed
  • Pain With Menstruation
  • Temporary Redness Of Face And Neck
  • 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.