Memantine HCL Side Effects by Likelihood and Severity

COMMON side effects

If experienced, these tend to have a Severe expression i

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If experienced, these tend to have a Less Severe expression i

  • confusion
  • constipation
  • dizziness
  • headache
  • cough
  • diarrhea

    • INFREQUENT side effects

    If experienced, these tend to have a Severe expression i

  • high blood pressure
  • the flu
  • hallucinations

    • If experienced, these tend to have a Less Severe expression i

  • depression
  • aggressive behavior
  • low blood pressure
  • a common cold
  • backache
  • drowsiness
  • low energy
  • pain
  • weight gain
  • vomiting
  • involuntary leakage of urine
  • stomach cramps
  • anxious feelings

    • RARE side effects

    If experienced, these tend to have a Severe expression i

  • a type of blood disorder with a decrease in all types of blood cells called pancytopenia
  • anemia
  • decreased blood platelets
  • very low levels of granulocytes, a type of white blood cell
  • low levels of white blood cells
  • suicidal thoughts
  • a heart attack
  • a clot in the lung
  • atrioventricular block, a type of slow heart rhythm disorder
  • torsades de pointes, a type of abnormal heart rhythm
  • atrial fibrillation
  • prolonged QT interval on EKG
  • chronic heart failure
  • blood clot in a deep vein of the extremities
  • thrombotic thrombocytopenic purpura, a type of blood disorder
  • pneumonia
  • inflammation of the liver called hepatitis
  • acute kidney failure
  • a skin disorder with blistering and peeling skin called Stevens-Johnson syndrome
  • trouble breathing
  • abnormal liver function tests
  • accidental falls
  • pancreatitis

    • If experienced, these tend to have a Less Severe expression i

  • dehydration
  • slow heartbeat
  • throat irritation
  • bronchitis
  • urinary tract infection
  • seizures
  • difficulty sleeping
  • fever
  • abnormal manner of walking
  • fluid retention in the legs, feet, arms or hands
  • decreased appetite
  • nausea
  • the inability to control a bowel movement
  • high blood sugar
  • nervousness
  • generalized weakness
  • irritability
    • Full Drug Information

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    Selected from data included with permission and copyrighted by First Databank, Inc. This copyrighted material has been downloaded from a licensed data provider and is not for distribution, except as may be authorized by the applicable terms of use.

    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.