Memantine HCL Side Effects by Likelihood and Severity

COMMON side effects


If experienced, these tend to have a Less Severe expression

  • Confusion
  • Constipation
  • Cough
  • Diarrhea
  • Dizziness
  • Headache

INFREQUENT side effects


If experienced, these tend to have a Severe expression

  • Hallucinations
  • High Blood Pressure
  • The Flu

If experienced, these tend to have a Less Severe expression

  • A Common Cold
  • Aggressive Behavior
  • Anxious Feelings
  • Backache
  • Depression
  • Drowsiness
  • Involuntary Leakage Of Urine
  • Low Blood Pressure
  • Low Energy
  • Pain
  • Stomach Cramps
  • Vomiting
  • Weight Gain

RARE side effects


If experienced, these tend to have a Severe expression

  • A Clot In The Lung
  • A Heart Attack
  • A Skin Disorder With Blistering And Peeling Skin Called Stevens-Johnson Syndrome
  • A Type Of Blood Disorder With A Decrease In All Types Of Blood Cells Called Pancytopenia
  • Abnormal Liver Function Tests
  • Accidental Falls
  • Acute Kidney Failure
  • Anemia
  • Atrial Fibrillation
  • Atrioventricular Block, A Type Of Slow Heart Rhythm Disorder
  • Blood Clot In A Deep Vein Of The Extremities
  • Chronic Heart Failure
  • Decreased Blood Platelets
  • Inflammation Of The Liver Called Hepatitis
  • Low Levels Of A Type Of White Blood Cell Called Neutrophils
  • Low Levels Of White Blood Cells
  • Pancreatitis
  • Pneumonia
  • Prolonged QT Interval On EKG
  • Suicidal Thoughts
  • Thrombotic Thrombocytopenic Purpura, A Type Of Blood Disorder
  • Torsades De Pointes, A Type Of Abnormal Heart Rhythm
  • Trouble Breathing
  • Very Low Levels Of Granulocytes, A Type Of White Blood Cell

If experienced, these tend to have a Less Severe expression

  • Abnormal Manner Of Walking
  • Bronchitis
  • Decreased Appetite
  • Dehydration
  • Difficulty Sleeping
  • Fever
  • Fluid Retention In The Legs, Feet, Arms Or Hands
  • Generalized Weakness
  • High Blood Sugar
  • Irritability
  • Nausea
  • Nervousness
  • Seizures
  • Slow Heartbeat
  • The Inability To Control A Bowel Movement
  • Throat Irritation
  • Urinary Tract Infection

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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.