Flexeril Tablet Side Effects by Likelihood and Severity

COMMON side effects


If experienced, these tend to have a Less Severe expression

  • Dizziness
  • Drowsiness
  • Dry Mouth
  • Indigestion
  • Low Energy
  • Nausea

INFREQUENT side effects


If experienced, these tend to have a Less Severe expression

  • Blurred Vision
  • Head Pain
  • Taste Impairment

RARE side effects


If experienced, these tend to have a Severe expression

  • A Disorder With Excess Antidiuretic Hormone Called Syndrome Of Inappropriate Antidiuretic Hormone
  • A Heart Attack
  • A Significant Type Of Allergic Reaction Called Anaphylaxis
  • A Stroke
  • A Toxic Effect On The Central Nervous System, Which Consists Of The Brain And Spinal Cord
  • A Type Of Allergic Reaction Called Angioedema
  • A Type Of Significant Allergic Skin Reaction Called DRESS Syndrome
  • A Type Of Slowed Heart Rhythm Disorder Called Heart Block
  • A Yellowing Of The Eyes Or Skin From Buildup Of Bilirubin Called Jaundice
  • Abnormal Heart Rhythm
  • Abnormal Liver Function Tests
  • Abnormal Results For A Test Recording The Brain's Activity
  • An Inability To Completely Empty The Bladder
  • Blockage Of Normal Bile Flow
  • Bronchospasm
  • Confusion
  • Depression
  • Extrapyramidal Disease, A Type Of Movement Disorder
  • Fainting
  • Fast Heartbeat
  • Hallucinations
  • High Blood Pressure
  • Hives
  • Inflammation Of The Liver Called Hepatitis
  • Itching
  • Loss Of Muscle Coordination
  • Mental Problems From Taking The Drug
  • Neuroleptic Malignant Syndrome, A Reaction Characterized By Fever, Muscle Rigidity And Confusion
  • Paranoia
  • Seizures
  • Serotonin Syndrome, A Type Of Disorder With High Serotonin Levels
  • Trouble Breathing

If experienced, these tend to have a Less Severe expression

  • A Change In The Ability To Pay Attention
  • A Feeling Of General Discomfort Called Malaise
  • A Loss Of Taste
  • A Skin Rash
  • A Type Of Speech Disorder Called Dysarthria
  • Acne
  • Agitation
  • Altered Interest In Having Sexual Intercourse
  • An Increased Need To Urinate Often
  • Bell's Palsy Paralysis Of One Side Of The Face
  • Breastmilk Production Not Associated With Childbirth Or Nursing
  • Chest Pain
  • Constipation
  • Decreased Appetite
  • Diarrhea
  • Difficult Or Painful Urination
  • Difficulty Sleeping
  • Enlarged Breasts
  • Excessive Sweating
  • Gas
  • Heart Throbbing Or Pounding
  • Inflammation Of The Parotid Gland
  • Inflammation Of The Skin Due To An Allergy
  • Intense Abdominal Pain
  • Irritation Of The Stomach Or Intestines
  • Low Blood Pressure
  • Muscle Tremors
  • Muscle Weakness
  • Nervousness
  • Numbness And Tingling
  • Ringing In The Ears
  • Sensation Of Spinning Or Whirling
  • Twitching
  • Visible Water Retention
  • Vomiting
  • Widening Of Blood Vessels

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.