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Side Effects of Cyclobenzaprine 10 mg Tabs

Cyclobenzaprine is a medication used to manage pain from muscle injuries, sprains and strains, says MedlinePlus 12. It is a muscle relaxant that works on the neurotransmitters, or chemicals, in your brain so you perceive less pain. According to the National Library of Medicine, you will take 5 milligrams of cyclobenzaprine three times daily 123. Your doctor can increase the dosage to 10 mg three times a day if 5 mg is ineffective in treating your injuries.

Is This an Emergency?

If you are experiencing serious medical symptoms, seek emergency treatment immediately.

Common Side Effects

According to, cyclobenzaprine commonly causes blurry vision, drowsiness, a dry mouth, muscle weakness, a dry throat and poor appetite 12.cause:

  • According to
  • cyclobenzaprine commonly causes blurry vision
  • drowsiness
  • a dry mouth
  • muscle weakness
  • a dry throat
  • poor appetite 12

It can also cause

  • fatigue
  • dizziness
  • nausea
  • diarrhea
  • constipation
  • stomach pain

These side effects are not life threatening, but call your doctor if these symptoms last for four to five days.

Harmful Side Effects

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Cyclobenzaprine can cause various harmful side effects 12. MedlinePlus says that it can cause chest pain, convulsions, seizures, trouble breathing and dysphagia (trouble swallowing). It can cause facial or tongue edema (swelling), a severe skin rash and an arrythmia (irregular heartbeat). Cyclobenzapirine's other critical effects include:

  • confusion
  • numbness on one side of the body
  • lack of coordination
  • hallucinations
  • light-headedness
  • fainting

It can cause a headache, unsteadiness, dark-colored urine and yellowing of your eyes or skin. These are urgent symptoms that require rapid medical attention.

Other Side Effects

According to the National Library of Medicine, cyclobenzaprine can cause:

  • tachycardia (a fast heartbeat)
  • palpitations (a pounding heartbeat)
  • flatulence (gas)
  • thirst
  • depression
  • anxiety
  • depression 123

It can cause euphoria, diaphoresis (sweating), diplopia (double vision), tinnitus (ringing in the ears) and frequent urination.

Miscellaneous Concerns

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You should avoid cyclobenzaprine if you are allergic to it 12. Cyclobenzaprine may provoke respiratory difficulties, swelling of your face or tongue, and hives 12. recommends that you avoid cyclobenzaprine if you are taking a monoamine oxidase inhibitor such as phenelzine, trancycloprine or selegiline 12. These medications may combine with cyclobenzaprine and cause the aforementioned harmful side effects 12.

Inform you physician if you have congestive heart failure, hyperthyroidism (a condition in which your thyroid gland is overactive), an enlarged prostate, liver problems or glaucoma (a condition in which your eye pressures are increased). Cyclobenzaprine can worsen these conditions 12. says that it is not known whether cyclobenzaprine contaminates breast milk or harms your baby during pregnancy 12. However, it is crucial to tell your physician if you are pregnant, nursing or plan to become pregnant.

You should not combine cyclobenzaprine with such drugs as atropine, glycopyrrolate, guanethidine, mepenzolate, tramadol, oxybutynin or dicyclomine 12. The combination can harm you and provoke the aforementioned effects.

  • You should avoid cyclobenzaprine if you are allergic to it 1.
  • says that it is not known whether cyclobenzaprine contaminates breast milk or harms your baby during pregnancy 1.