Valtrex Side Effects by Likelihood and Severity

COMMON side effects


If experienced, these tend to have a Less Severe expression

  • Feel Like Throwing Up
  • Head Pain

INFREQUENT side effects


If experienced, these tend to have a Severe expression

  • Painful Periods

If experienced, these tend to have a Less Severe expression

  • Constipation
  • Diarrhea
  • Disorder Of The Digestive System
  • Dizzy
  • Joint Pain
  • Loss Of Appetite
  • Low Energy
  • Stomach Cramps
  • Throwing Up

RARE side effects


If experienced, these tend to have a Severe expression

  • Coma
  • Decreased Blood Platelets
  • Decreased Neutrophils A Type Of White Blood Cell
  • Disorder Of The Brain
  • Erythema Multiforme
  • Giant Hives
  • High Blood Pressure
  • Hives
  • Kidney Failure
  • Life Threatening Allergic Reaction
  • Seizures
  • Trouble Breathing

If experienced, these tend to have a Less Severe expression

  • Aggressive Behavior
  • Agitation
  • Behaving With Excessive Cheerfulness And Activity
  • Confused
  • Fast Heartbeat
  • Hallucination
  • Rash
  • Shaking Extremities
  • Sun-Sensitive Skin
  • Uncoordinated

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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.