COMTAN Side Effects by Likelihood and Severity

COMMON side effects

If experienced, these tend to have a Severe expression i

  • hyperactive behavior
  • hallucinations
  • diminished movement
  • a type of abnormal movement disorder called dyskinesia

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

  • constipation
  • dizziness
  • low energy
  • nausea
  • abnormal color of urine
  • intense abdominal pain

INFREQUENT side effects

If experienced, these tend to have a Severe expression i

  • a bacterial infection
  • orthostatic hypotension, a form of low blood pressure
  • fainting

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

  • large purple or brown skin blotches
  • agitation
  • dry mouth
  • a type of stomach irritation called gastritis
  • indigestion
  • backache
  • drowsiness
  • excessive sweating
  • taste impairment
  • trouble breathing
  • vomiting
  • gas
  • anxious feelings

RARE side effects

If experienced, these tend to have a Severe expression i

  • mental problems from taking the drug
  • confusion
  • paranoia
  • aggressive behavior
  • neuroleptic malignant syndrome, a reaction characterized by fever, muscle rigidity and confusion
  • escape of fluid into the lungs
  • a condition where there is formation of fibrous tissue in the lung called pulmonary fibrosis
  • x-ray results showing lung tissue changes
  • inflammation of the large intestine
  • inflammation of the liver called hepatitis
  • retroperitoneal fibrosis
  • a condition with muscle tissue breakdown called rhabdomyolysis
  • delirium
  • mental status changes
  • fever
  • a sudden onset of sleep

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

  • an inability to control impulsive behavior

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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.