NALTREXONE HCL Side Effects by Likelihood and Severity

COMMON side effects

If experienced, these tend to have a Severe expression i

  • inflammation of the skin due to an allergy
  • a skin rash
  • a type of allergic reaction called angioedema

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

  • joint pain
  • muscle pain
  • difficulty sleeping
  • low energy
  • headache
  • nausea
  • vomiting
  • stomach cramps
  • anxious feelings

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
    • inflammation of the tissue lining the sinuses
    • stuffy nose
    • constipation
    • dizziness
    • chills
    • decreased appetite
    • excessive thirst
    • hoarseness
    • sneezing
    • cough
    • diarrhea
    • nervousness
    • runny nose
    • irritability
    • fast heartbeat

    RARE side effects

    If experienced, these tend to have a Severe expression i

    • low platelet count and bleeding from immune response
    • confusion
    • mood changes
    • suicidal thoughts
    • depression
    • blurred vision
    • eye pain
    • eye inflammation
    • eye irritation
    • ringing in the ears
    • an earache
    • high blood pressure
    • abnormal heart electrical signals
    • stomach or intestinal ulcer
    • damage to the liver and inflammation
    • itching
    • mental status changes
    • hallucinations
    • sleep apnea
    • fever
    • nosebleed
    • swollen lymph nodes
    • trouble breathing
    • difficult or painful urination
    • an increased need to urinate often
    • abnormal liver function tests
    • inflammation of a vein

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

    • the inability to have an erection
    • drowsiness
    • muscle tremors
    • muscle twitching
    • visible water retention
    • heart throbbing or pounding

    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 naltrexone HCL?

    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.