Welcome to TreatMuscleSpasms.com, a web site designed to help you understand muscle spasms, possible causes, and treatment options, including AMRIX® (Cyclobenzaprine Hydrochloride Extended-Release Capsules) — a once-a-day muscle relaxer.

about muscle spasms

Muscle spasm is a common and often painful condition. In a recent survey, 83 percent of U.S. adults said they had experienced muscle spasms. Episodes of muscle spasms usually do not last very long — typically no more than two to three weeks — and often come back. Pain from muscle spasms can interfere with regular activities.

When muscle spasms disrupt your regular routine, taking steps that treat the spasms and relieve the pain can help you get back on track.

This web site contains information about muscle spasms and their treatment. The information is provided for educational purposes only and is not intended to replace the advice of a physician or other health care professional. You should always consult with a physician or other health care professional about your condition or treatment.

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AMRIX is a prescription medicine to be used along with rest and physical therapy to help control muscle spasm associated with acute, painful musculoskeletal conditions. Like other muscle relaxers, AMRIX should only be taken for short periods (up to two to three weeks). It should be taken at about the same time each day.

Certain medicines may cause serious or potentially life-threatening consequences when taken in combination with AMRIX, so tell your health care professional if you are taking any medicines.

You should not use AMRIX if you:

  • Are sensitive to any of its ingredients
  • Are taking certain antidepressants, such as monoamine oxidase inhibitors (MAOIs)
  • Are 65 years old or older 
  • Have liver problems
  • Have certain types of heart problems
  • Have an overactive thyroid

Before taking AMRIX, talk to your health care professional about all of your medical conditions, including any history of heart problems, urinary problems, or glaucoma.

AMRIX may affect your ability to perform certain hazardous tasks, such as operating machinery or driving a motor vehicle, especially when used with alcohol or other sedatives.

Side effects of AMRIX may include dry mouth, dizziness, fatigue, nausea, upset stomach, constipation, and drowsiness. Click here for full prescribing information.

AMRIX is distributed by Cephalon and produced with Eurand Diffucaps® technology.

For more information about AMRIX, please call Cephalon Medical Services at 1-800-896-5855.