Cyclobenzaprine is a prescription medication indicated to help relax tense, painful muscles following injuries, such as muscle sprains or strains. This medication is administered orally up to four times daily or as prescribed by a medical professional. Before receiving treatment with this muscle relaxant, patients should discuss cyclobenzaprine side effects with a doctor.
Drowsiness, Weakness or Fatigue
The most common side effect of cyclobenzaprine is drowsiness. During clinical trials for this medication, approximately 29 and 38 percent of patients treated with either 5 mg or 10 mg of cyclobenzaprine, respectively, reported drowsiness, according to the U.S. Food and Drug Administration. Patients who experience drowsiness may also become fatigued or weak. These side effects can limit their ability to physically participate in their normal daily tasks.
Dry Throat or Mouth
Treatment with this muscle relaxant may cause dry throat or mouth side effects in patients, MedlinePlus reports. Affected patients may experience increased thirst, sore throat, difficulty swallowing or thickened saliva.
Blurred Vision or Dizziness
Blurred or double vision may develop as side effects of cyclobenzaprine in treated patients, Drugs.com warns. These vision complications may lead to dizziness or lightheadedness in certain patients. Episodes of dizziness may cause patients to appear unsteady, disoriented, uncoordinated or confused while standing, walking or sitting. If these side effects occur, affected patients should seek care from a medical professional.
Upset Stomach
Upset stomach side effects may develop after a patient takes a dose of cyclobenzaprine. These stomach-related effects may include stomach pain, nausea, diarrhea or constipation. Additionally, certain patients may experience abdominal gas or bloating or a diminished appetite. If these side effects develop in conjunction with stool, urine or skin discoloration symptoms, patients should consult a doctor immediately.
Heart Rate Changes or Chest Pain
While taking cyclobenzaprine, certain patients may develop abnormal heart rate irregularities. Cardiac or chest pain side effects that occur during treatment with this medication should be reported to a physician immediately, MedlinePlus advises. These side effects may also be signs of alternate medical problems, such as a heart attack.
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