Allopurinol Side Effects by Likelihood and Severity

COMMON side effects


If experienced, these tend to have a Severe expression

  • Hives
  • Inflammation Of Skin Caused By An Allergy
  • Itching
  • Rash

INFREQUENT side effects


If experienced, these tend to have a Severe expression

  • Abnormal Liver Function Tests

RARE side effects


If experienced, these tend to have a Severe expression

  • Acquired Decrease Of All Cells In The Blood
  • Acute Inflammation Of The Pancreas
  • Anemia
  • Bleeding Of The Stomach Or Intestines
  • Bronchospasm
  • Cataracts
  • Decreased Blood Platelets
  • Decreased Function Of Bone Marrow
  • Deficiency Of Granulocytes A Type Of White Blood Cell
  • DRESS Syndrome
  • Erythema Multiforme
  • Hemolytic Anemia
  • Hepatitis Caused By Drugs
  • High Amount Of Calcium In The Blood
  • Hypersensitivity Drug Reaction
  • Increased Lymphocyte Cells In The Blood
  • Inflammation Of The Covering Of The Heart Or Pericardium
  • Kidney Failure
  • Kidney Inflammation
  • Kidney Stone
  • Large Purple Or Brown Skin Blotches
  • Liver Tissue Death
  • Loose Nails
  • Low Blood Counts Due To Bone Marrow Failure
  • Nosebleed
  • Peripheral Neuropathy
  • Skin Rash With Sloughing
  • Slow Heartbeat
  • Stevens-Johnson Syndrome
  • Sudden Blindness And Pain Upon Moving The Eye
  • Swollen Lymph Nodes
  • Toxic Epidermal Necrolysis
  • Vasculitis
  • Yellowing Of Skin Or Eyes From Bile Flow Problems
  • Yellowing Of Skin Or Eyes From Liver Problems

If experienced, these tend to have a Less Severe expression

  • Altered Interest In Having Sexual Intercourse
  • Asthma
  • Blood Clot In Vein
  • Bloody Urine
  • Burning Stomach
  • Chronic Trouble Sleeping
  • Confused
  • Decreased White Blood Cells
  • Depression
  • Diarrhea
  • Dizzy
  • Drowsiness
  • Elevation Of Proteins In The Urine
  • Enlarged Breasts
  • Excessive Sweating
  • Feel Like Throwing Up
  • Feeling Weak
  • Fever
  • Hair Loss
  • Head Pain
  • Hemorrhage Of Blood Under The Skin
  • Inability To Have An Erection
  • Increase Of White Blood Cells
  • Increased Eosinophils In The Blood
  • Indigestion
  • Inflammation Of The Iris - The Colored Part Of The Eyeball
  • Inflammation Of The Nose
  • Inflammation Of The Salivary Glands
  • Joint Pain
  • Lazy Eye
  • Loss Of Appetite
  • Loss Of Memory
  • Male Infertility
  • Muscle Pain
  • Muscle Problems
  • Numbness And Tingling
  • Painful, Red Or Swollen Mouth
  • Pink Eye
  • Presence Of Boils On The Skin
  • Puffy Face From Water Retention
  • Ringing In The Ears
  • Sensation Of Spinning Or Whirling
  • Skin Disease Characterized By Swollen Itching Lesions
  • Stomach Cramps
  • Taste Problems
  • Throat Irritation
  • Throwing Up
  • Visible Water Retention
  • Widening Of Blood Vessels

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.