Synera Adhesive Patch, Medicated Self-Heating Side Effects by Likelihood and Severity

INFREQUENT side effects


If experienced, these tend to have a Less Severe expression

  • A Skin Rash
  • A Stinging Sensation On The Skin
  • Itching

RARE side effects


If experienced, these tend to have a Severe expression

  • A Bluish Discoloration Of The Skin
  • A Significant Type Of Allergic Reaction Called Anaphylaxis
  • A Toxic Effect On The Central Nervous System, Which Consists Of The Brain And Spinal Cord
  • A Type Of Allergic Reaction Called Angioedema
  • Abnormal Heart Rhythm
  • Bronchospastic Lung Disease
  • Decreased Lung Function
  • Headache
  • Inflammation Of The Skin With Blisters
  • Low Blood Pressure
  • Lung Failure Causing Loss Of Breath
  • Methemoglobinemia, A Type Of Blood Disorder
  • Seizures
  • Skin Burn Caused By Transdermal Patch Worn During MRI
  • Skin Inflammation Due To A Topically Applied Medication
  • Slow Heartbeat
  • Unconsciousness

If experienced, these tend to have a Less Severe expression

  • A Feeling Of Pins And Needles On Skin
  • A Sensation Of Feeling Cold
  • A Sensation Of Feeling Warm
  • An Extreme Sense Of Wellbeing Called Euphoria
  • Apprehension
  • Blanching Of Skin
  • Blurred Vision
  • Confusion
  • Dizziness
  • Drowsiness
  • Erythema Or Redness Of Skin Or Mucous Membrane
  • Hives
  • Muscle Tremors
  • Muscle Twitching
  • Nausea
  • Nervousness
  • Ringing In The Ears
  • Visible Water Retention
  • Vomiting

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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.