Allopurinol Side Effects by Likelihood and Severity

COMMON side effects

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If experienced, these tend to have a Severe expression

• A Skin Rash
• Hives
• Inflammation Of The Skin Due To An Allergy
• Itching

INFREQUENT side effects

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If experienced, these tend to have a Severe expression

• Abnormal Liver Function Tests

RARE side effects

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If experienced, these tend to have a Severe expression

• A Blockage Of The Bile Duct That Resulting In High Bilirubin Levels
• A Condition With Loosening Of The Nails From The Nailbed Called Onycholysis
• A Painful Condition That Affects The Nerves In The Legs And Arms Called Peripheral Neuropathy
• A Skin Disorder With Blistering And Peeling Skin Called Stevens-Johnson Syndrome
• A Skin Disorder With Blistering And Peeling Skin Called Toxic Epidermal Necrolysis
• A Type Of Blood Disorder Where The Red Blood Cells Burst
• A Type Of Blood Disorder With A Decrease In All Types Of Blood Cells Called Pancytopenia
• A Type Of Significant Allergic Skin Reaction Called DRESS Syndrome
• A Yellowing Of The Eyes Or Skin From Buildup Of Bilirubin Called Jaundice
• Acute Inflammation Of The Pancreas
• An Allergic Reaction To A Drug
• Anemia
• Bleeding Of The Stomach Or Intestines
• Bronchospasm
• Clouding Of The Lens Of The Eye Called Cataracts
• Damage To The Liver And Inflammation
• Decreased Blood Platelets
• Decreased Function Of Bone Marrow
• Erythema Multiforme, A Type Of Allergic Skin Reaction
• High Amount Of Calcium In The Blood
• Increased Lymphocyte Cells In The Blood
• Inflammation Of The Blood Vessels
• Inflammation Of The Covering Of The Heart Or Pericardium
• Kidney Failure
• Kidney Inflammation
• Kidney Stones
• Large Purple Or Brown Skin Blotches
• Liver Tissue Death
• Low Blood Counts Due To Bone Marrow Failure
• Nosebleed
• Skin Rash With Sloughing
• Slow Heartbeat
• Sudden Blindness And Pain Upon Moving The Eye
• Swollen Lymph Nodes
• Very Low Levels Of Granulocytes, A Type Of White Blood Cell

If experienced, these tend to have a Less Severe expression

• A Disease With Shrinking And Weaker Muscles Called Myopathy
• A Type Of Stomach Irritation Called Gastritis
• Altered Interest In Having Sexual Intercourse
• Asthma
• Bloody Urine
• Bruising Under The Skin
• Confusion
• Decreased Appetite
• Depression
• Diarrhea
• Difficulty Sleeping
• Dizziness
• Drowsiness
• Elevation Of Proteins In The Urine
• Enlarged Breasts
• Excessive Sweating
• Fever
• Furunculosis, A Type Of Skin Infection
• Generalized Weakness
• Hair Loss
• Head Pain
• High Levels 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
• Low Levels Of White Blood Cells
• Male Infertility
• Memory Loss
• Muscle Pain
• Nausea
• Numbness And Tingling
• Pink Eye
• Puffy Face From Water Retention
• Ringing In The Ears
• Sensation Of Spinning Or Whirling
• Skin Disease Characterized By Swollen Itching Lesions
• Stomach Cramps
• Stomatitis, A Condition With Painful Swelling And Sores Inside The Mouth
• Taste Impairment
• The Inability To Have An Erection
• Throat Irritation
• Thrombophlebitis, An Inflamed Vein Due To A Blood Clot
• Visible Water Retention
• Vomiting
• Widening Of Blood Vessels