VALTREX Side Effects by Likelihood and Severity

COMMON side effects

If experienced, these tend to have a Severe expression i

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

    • headache
    • nausea
    • intense abdominal pain

    INFREQUENT side effects

    If experienced, these tend to have a Severe expression i

    • pain with menstruation
    • a high alanine transaminase level

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

    • constipation
    • joint pain
    • dizziness
    • low energy
    • decreased appetite
    • vomiting
    • diarrhea

    RARE side effects

    If experienced, these tend to have a Severe expression i

    • hemolytic uremic syndrome, a condition that affects the kidney and the blood
    • decreased blood platelets
    • low levels of a type of white blood cell called neutrophils
    • mental problems from taking the drug
    • a type of brain function problem called encephalopathy
    • high blood pressure
    • thrombotic thrombocytopenic purpura, a type of blood disorder
    • inflammation of the liver called hepatitis
    • kidney failure
    • erythema multiforme, a type of allergic skin reaction
    • hives
    • coma
    • seizures
    • puffy face from water retention
    • trouble breathing
    • a significant type of allergic reaction called anaphylaxis
    • a type of allergic reaction called angioedema

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

    • manic behavior
    • aggressive behavior
    • a change in vision
    • increased sensitivity of the skin to the sun
    • itching
    • hair loss
    • muscle tremors
    • loss of muscle coordination
    • a skin rash
    • kidney pain
    • fast heartbeat

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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.