OMEPRAZOLE Side Effects by Likelihood and Severity

COMMON side effects

If experienced, these tend to have a Severe expression i

    Sorry, we have no data available. Please contact your doctor or pharmacist.

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

    • headache
    • vomiting
    • gas
    • diarrhea
    • intense abdominal pain

    INFREQUENT side effects

    If experienced, these tend to have a Severe expression i

      Sorry, we have no data available. Please contact your doctor or pharmacist.

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

      • a sore throat
      • constipation
      • itching
      • backache
      • dizziness
      • fever
      • cough
      • chest pain
      • nausea
      • generalized weakness

      RARE side effects

      If experienced, these tend to have a Severe expression i

      • diarrhea from an infection with Clostridium difficile bacteria
      • a fungal infection in the esophagus due to Candida
      • low blood sugar
      • low amount of sodium in the blood
      • 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
      • low levels of a type of white blood cell called neutrophils
      • high levels of white blood cells
      • sudden blindness and pain upon moving the eye
      • high blood pressure
      • slow heartbeat
      • abnormal heart rhythm
      • bronchospasm
      • liver failure
      • inflammation of the liver called hepatitis
      • a type of kidney inflammation called interstitial nephritis
      • bloody urine
      • erythema multiforme, a type of allergic skin reaction
      • a skin disorder with blistering and peeling skin called toxic epidermal necrolysis
      • a skin disorder with blistering and peeling skin called Stevens-Johnson syndrome
      • subacute cutaneous lupus erythematosus
      • hives
      • systemic lupus erythematosus, an autoimmune disease
      • high amount of bilirubin in the blood
      • elevation of proteins in the urine
      • abnormal liver function tests
      • a broken bone
      • a significant type of allergic reaction called anaphylaxis
      • a type of allergic reaction called angioedema
      • inflammation of the liver with stoppage of bile flow
      • a sudden vision loss due to loss of the blood supply to the front of the optic nerve
      • pancreatitis
      • inflammation of the stomach called atrophic gastritis
      • a high alanine transaminase level
      • a high aspartate transaminase level

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

      • large purple or brown skin blotches
      • double vision
      • blurred vision
      • dry eye
      • eye irritation
      • ringing in the ears
      • dry mouth
      • stomatitis, a condition with painful swelling and sores inside the mouth
      • irritable colon
      • enlarged breasts
      • skin inflammation
      • increased sensitivity of the skin to the sun
      • hair loss
      • dry skin
      • muscle weakness
      • muscle pain
      • cramps
      • sensation of spinning or whirling
      • a sleep disorder
      • low energy
      • excessive sweating
      • pain
      • muscle tremors
      • taste impairment
      • fluid retention in the legs, feet, arms or hands
      • small reddish-purplish pin-point sized spots on skin
      • decreased appetite
      • weight gain
      • nosebleed
      • heart throbbing or pounding
      • an abnormal stool color
      • abdominal bloating
      • a condition where there is excess sugar in the urine
      • a feeling of pins and needles on skin
      • a feeling of general discomfort called malaise
      • pain in the testicles
      • leg pain
      • fast heartbeat

      Free RX Coupon

      Save up to 80% on your prescriptions.

      Available coupons

      Save up to 80% on your prescription with WebMDRx

      Drug Survey

      Are you currently using omeprazole?

      This survey is being conducted by the WebMD marketing sciences department.

      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.