Adverse effects of Flexeril you need to know about

Flexeril is used as a muscle relaxant and many people use it for muscle sprains and muscle injuries. It certainly helps relieve pain, but there are many side effects related to Flexeril. Though not all side effects are serious, but you should be aware of the ones that you need to pay immediate attention to. Let us look at side effects of Flexeril as below

Common side effects

  • Drowsiness
  • Fatigue
  • Xerostomia
  • Drowsiness

Apart from the common side effects stated above, there are some serious side effects that need immediate medical attention and they include

  • Convulsions
  • Hot, dry and flushed skin
  • Irregular or fast heartbeat
  • Increase/decrease in your body temperature
  • Muscle stiffness
  • Breathing problems
  • Severe restlessness or nervousness
  • Vomiting (with other overdose symptoms)
  • Hallucinations ( hearing, feeling or seeing things that doesn’t exist)

Moderate Side effects

  • Confusion
  • Unsteadiness and clumsiness
  • Yellow skin or eyes
  • Unusual dreams or thoughts
  • Mood changes or mental depression
  • Hives, skin rash, itching

Minor side effects that occur because of Flexeril and do not need medical attention are

Some side effects that arise because of Flexeril use and need no medical attention are as given below. As your body becomes used to the drug during treatment, side effects may vanish with time. Your doctor will help your know about how to prevent some of the side effects listed below. If any of these side effects continue, check with your doctor immediately.

  1. Blurred vision
  2. Dry mouth
  3. Dizziness

Less common/rare side effects are

  1. Constipation
  2. Diarrhea
  3. Stomach cramps, pain, bloated feeling, indigestion, gas or nausea
  4. Nervousness or excitement
  5. Headache
  6. Pounding heartbeat
  7. Trembling
  8. Feeling of illness or discomfort
  9. Frequent urination
  10. Weakness in feet, hands, pain, numbness, tingling
  11. Speech problems
  12. Muscle twitching
  13. Taste changes or unpleasant taste
  14. Unusual tiredness or muscle weakness

The effects related to various systems in our body are


Hypotension, vasodilatation, Tachycardia and arrhythmia


  • Vomiting
  • Gastrointestinal pain,
  • Gastritis,
  • Thirst,
  • Jaundice,
  • problems in liver functions,
  • Cholestasis, hepatitis and flatulence etc.,


Facial edema








Urinary retention and/or frequency

There are also side effects associated with overdose of the drug. Overdose of this drug also result in suicidal cases, wherein the person taking excess amounts of Flexeril gets suicidal thoughts and the person tries to attempt suicide. In such cases people around him should monitor for change in his moods and behavior. Consulting a psychiatrist can help a lot.

There are sides effects related to overdose that can be fatal too. Flexeril when used in right doses gives better results, else it can be life threatening too. Talk to your doctor about how Flexeril can help you and the right dose that suits you. Do not make yourself dependent on drug and it becomes difficult to overcome drug dependency.

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