Famciclovir Side Effects by Likelihood and Severity

COMMON side effects

If experienced, these tend to have a Less Severe expression

  • Diarrhea
  • Headache
  • Nausea

INFREQUENT side effects

If experienced, these tend to have a Severe expression

  • Low Levels Of A Type Of White Blood Cell Called Neutrophils

If experienced, these tend to have a Less Severe expression

  • A Feeling Of Pins And Needles On Skin
  • Dizziness
  • Gas
  • Itching
  • Low Energy
  • Pain With Menstruation
  • Vomiting

RARE side effects

If experienced, these tend to have a Severe expression

  • A Blockage Of The Bile Duct That Resulting In High Bilirubin Levels
  • A Significant Type Of Allergic Reaction Called Anaphylaxis
  • 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 Skin Rash
  • A Type Of Allergic Reaction Called Angioedema
  • Abnormal Liver Function Tests
  • Allergic Reaction Causing Inflammation Of Blood Vessels
  • Confusion
  • Decreased Blood Platelets
  • Erythema Multiforme, A Type Of Allergic Skin Reaction
  • Hallucinations
  • Low Levels Of White Blood Cells
  • Seizures

If experienced, these tend to have a Less Severe expression

  • A Migraine Headache
  • Drowsiness
  • Heart Throbbing Or Pounding
  • Hives
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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.