Memantine HCL Side Effects by Likelihood and Severity

COMMON side effects


If experienced, these tend to have a Less Severe expression

  • Confused
  • Constipation
  • Cough
  • Diarrhea
  • Dizzy
  • Head Pain

INFREQUENT side effects


If experienced, these tend to have a Severe expression

  • Hallucination
  • High Blood Pressure
  • The Flu

If experienced, these tend to have a Less Severe expression

  • Abnormally Low Blood Pressure
  • Acute Infection Of The Nose, Throat Or Sinus
  • Aggressive Behavior
  • Backache
  • Depression
  • Drowsiness
  • Feeling Anxious
  • Low Energy
  • Pain
  • Problems With Bladder Control
  • Stomach Cramps
  • Throwing Up
  • Weight Gain

RARE side effects


If experienced, these tend to have a Severe expression

  • Abnormal Liver Function Tests
  • Acquired Decrease Of All Cells In The Blood
  • Acute Renal Failure
  • Anemia
  • Atrial Fibrillation
  • Atrioventricular Heart Block
  • Blood Clot In A Deep Vein Of The Extremities
  • Chronic Heart Failure
  • Decreased Blood Platelets
  • Decreased White Blood Cells
  • Deficiency Of Granulocytes A Type Of White Blood Cell
  • Falling
  • Having Thoughts Of Suicide
  • Heart Attack
  • Hepatitis
  • Lung Embolism
  • Pancreatitis
  • Pneumonia
  • Prolonged QT Interval On EKG
  • Stevens-Johnson Syndrome
  • Thrombotic Thrombocytopenic Purpura
  • Trouble Breathing
  • Very Rapid Heartbeat - Torsades De Pointes

If experienced, these tend to have a Less Severe expression

  • Abnormal Manner Of Walking
  • Bronchitis
  • Chronic Trouble Sleeping
  • Easily Angered Or Annoyed
  • Extreme Loss Of Body Water
  • Feel Like Throwing Up
  • Feeling Weak
  • Fever
  • Fluid Retention In The Legs, Feet, Arms Or Hands
  • High Blood Sugar
  • Loss Of Appetite
  • Nervous
  • Seizures
  • Slow Heartbeat
  • Throat Irritation
  • Unable To Control Bowel Movement
  • Urinary Tract Infection